JP2001350791A - Product retrieving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method, with which a user can easily select a product in product selling on the Internet. SOLUTION: In product selling on the Internet, a server for providing a selling site on the Internet retrieves a product on the basis of the purpose of use selected by a terminal concerning the product to be sold. Then, a product, which satisfies retrieval conditions, is displayed on the Internet terminal. Thus, the selection of the product is facilitated for the user. Besides, in the case of selecting an accessory product to be connected to a main body product, the accessory product, with which operation is confirmed corresponding to the main body product, is displayed on the Internet terminal. Thus, the selection of the product is facilitated for the user. Further, the user can be prevented from erroneously purchasing the accessory product, which is not suited to the main body product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a product search method for searching for a desired product from a plurality of products, and more particularly to a product search method in a product sales transaction via the Internet.

[0002]

2. Description of the Related Art Product sales using the Internet are rapidly spreading. A user connects a personal computer (personal computer) to the Internet via a communication line, and displays a product sales site provided by a product sales company on a display using a Web browser.

[0003] For example, when the product is a personal computer, all types of personal computers to be sold are displayed in a list on a sales site. In the list, in addition to the product name, model name and price of each personal computer, the type of CPU, memory capacity, hard disk capacity, type of display, CD-ROM of each personal computer
(Or DVD-ROM drive), the main specifications such as the type of pre-installed software are displayed. In addition, a detail button is displayed for each personal computer on the list screen, and when the user clicks the button, an external appearance image of the selected personal computer and further detailed specifications are displayed as a detailed screen. The user compared and examined the specifications of each personal computer while looking at the list screen and the detailed screen, and selected the desired personal computer.

[0004]

However, when the product is a personal computer, the displayed specifications are difficult for the user to understand, and the user may not be able to associate what he wants to do (purpose of use) with the personal computer specifications. In such a case, it is necessary to go to a store to ask a clerk or refer to a catalog or the like, and it is not possible to easily select a product.

[0005] Further, if the user wants to purchase an accessory product of the main body product such as a peripheral device connected to the personal computer body at a sales site on the Internet, an operation check table indicating whether the peripheral device is normally operated by connecting to the personal computer body. It is necessary to select an attached product after making judgments. For this purpose, the user must separately refer to the operation check table provided on another site on the Internet and check the operation of the attached product by himself, which is troublesome. In addition, since the user himself / herself makes a judgment, there is a possibility that a peripheral device whose operation has not been confirmed may be purchased by mistake. Furthermore, it is difficult to sell peripheral devices via the Internet to users who are not confident in making a decision by looking at the operation check table.

Further, it takes time and effort for the user to find a desired product from among a large number of products displayed in the list.

Accordingly, an object of the present invention is to provide a method and an apparatus which allow a user to easily select a product in selling products on the Internet.

It is another object of the present invention to provide a method and an apparatus capable of easily selecting an accessory product of a main product.

[0009]

In order to achieve the above object, according to the present invention, in selling products via the Internet, products to be sold are searched based on the purpose of use of the products. Then, a product satisfying the search condition is displayed on the Internet terminal. This makes it easier for the user to select a product. When selecting an accessory product to be connected to the main product, the accessory product whose operation has been confirmed for the main product is displayed on the Internet terminal. This makes it easier for the user to select a product. In addition, it is possible to prevent the user from erroneously purchasing an accessory product that does not match the main product. Further, a product to be sold is searched based on the specification of the product. This also facilitates product selection.

Preferably, according to a first aspect of the present invention, in a product search method for searching for a desired product, a plurality of use purpose items related to a product are displayed, and at least one item selected from the items is displayed. A product is searched based on the purpose of use, and information of a product having a specification corresponding to the selected purpose of use is displayed on the terminal.

More preferably, in the first aspect of the present invention, a correspondence table between the purpose of use and specifications required to achieve the purpose is prepared in advance, and the specification corresponding to the selected purpose of use is stored in the correspondence table. From the table,
A product is searched using the acquired specification as a search condition.

Preferably, a second invention for achieving the above object is a product search method for searching for a desired accessory product related to a main product, wherein a correspondence table between the main product and the accessory product connectable to the main product is provided. Is prepared in advance, the correspondence table is searched based on a designated main product, and information on ancillary products that can be connected to the designated main product is displayed.

[0013] An apparatus for implementing the above invention is also provided.

[0014]

Embodiments of the present invention will be described below. However, the technical scope of the present invention is not limited to the present embodiment. In the embodiment of the present invention, as a product sold on the Internet,
Personal computer (personal computer) that is the main product,
And its peripheral products (printers, memories,
A hard disk device and an auxiliary storage device (for example, MO drive, DVD-ROM drive, etc.) will be described as examples.

FIG. 1 is a diagram showing a configuration example of a computer network according to an embodiment of the present invention. In FIG. 1, a server 10 and a plurality of client terminals 20
Is connected to the Internet through a communication line.
The server 10 is a server that provides an Internet sales site according to the embodiment of the present invention, and stores an HTML file for the site, various programs described below, a database, and the like. Each terminal 20 is, for example, a user's personal computer and has a CPU
It is provided with a control device including a CRT display, a display device such as a CRT display and a liquid crystal display, and an input device such as a keyboard and a mouse. The terminal 20 also has a server 1
A browser 21 is installed to acquire an HTML file from 0 and display it on a screen.

FIG. 2 is a diagram showing a configuration example of the server 10. The control device 11 includes a CPU and the like. The control device 11 performs file read control, file transfer control, control of each device in the server 10, database search, various arithmetic processes, and the like. The communication device 12 controls transmission and reception of a file. For example, the communication device 12 receives data from the terminal 20, transfers the data to the control device 11, and transmits a file transferred from the control device 11 to the terminal 20. Also, the following files are stored in the server 10
Is stored in a predetermined storage device.

The HTML file 13 is a file of a plurality of pages constituting an Internet sales site, and is described in HTML (HyperText Markup Language) language.

The main program file 14 is an HTM
A program for reading an L file and transferring it to the terminal 20, a program for processing data from the terminal 20,
HTM database search program and search results
It has a program to embed in an L file.

The product database 15 stores a plurality of pieces of attribute information corresponding to all products handled. For example, when the product is a personal computer, the attribute information is the price, form (whether desktop type or notebook type) and various specifications of the personal computer. The specifications include the type of CPU, the capacity of the memory, the capacity of the hard disk, the type of display, the presence or absence of a CD-ROM drive or a DVD-ROM drive, and the like.

In the first embodiment of the present invention, the server 10 searches a product based on the specification of the product selected by the terminal 20 from among a large number of products in the product database 15 and selects the product. A product having the specified specifications is displayed on the terminal 20. Alternatively, the server 10 searches for a product based on the purpose of use of the product selected by the terminal 20 and causes the terminal 20 to display a product having specifications that can achieve the selected purpose of use.

FIG. 3 is a flowchart of the first product selection process of the present invention in the server 10, and FIGS.
Is a screen example displayed on the terminal 20 corresponding to each process. FIG. 3 will be described with reference to FIGS.

In FIG. 3, first, the server 10 transmits an HTML file corresponding to the top menu screen shown in FIG. 4 to the terminal 20 in response to an access operation to the sales site at the terminal 20, and transmits the top menu screen to the terminal 20. Is displayed (S10). Subsequently, in response to a selection operation of “spec (specification) search” or “usage search” on the top menu screen of the terminal 20, the server 10 displays the specification search screen (FIG. 5) or the use purpose search screen (FIG. 7). One of them is displayed (S11a, S11b). The search screen in FIG. 5 is a screen for the user to select product specifications.
The server 10 responds to a specification selection operation on the terminal 20 by:
The product database 15 is searched based on the selected specification (S12a). The search screen in FIG. 7 is a screen for selecting the purpose of use of the product. The server 10 searches the product database 15 based on the selected purpose of use in response to the operation of selecting the purpose of use at the terminal 20 (S
12b).

In FIG. 5, the user operates the terminal 20 to select “budget” and “form (type)” from the search items.
Check at least one of the check boxes for each of the displayed price ranges and types. Further, the user can select three specification items to be searched. The number of specification items that can be selected is arbitrary. When the user clicks the button in the specification item designation column, FIG.
The specification menu shown in is displayed. When the user clicks on the specification item to be searched, the selected specification item is displayed, and the corresponding options are displayed. The specification items include “CPU” (type of CPU),
"Memory" (memory capacity), "Hard Disk" (hard disk capacity), "Display" (display type), "CD / DVD" (CD-ROM drive or DVD-ROM)
"Drive", "Expansion" (type and number of expansion slots), "AV coordination terminal" (whether there is an optical terminal for MD coordination, IEEE terminal for digital video editing, etc.), "CCD camera" (CCD "Pre-installed" (main pre-installed software (word processor /
Type of spreadsheet software), "Other (software)"
(Pre-installed software other than word processing and spreadsheet software).

FIG. 6 is an example of a screen when the specification item "CPU" is selected in one specification item designation column. When "CPU" is selected as the specification item, as shown in the figure,
All types of personal computer CPUs handled by the sales site are displayed. The user checks at least one check box of a desired CPU type.

A plurality of specification item specification columns are provided, and a plurality of specification items can be set as search conditions. When each specification item specification column is clicked, the specification menu shown in FIG. 5 is displayed, and the corresponding options are displayed.

As described above, in the embodiment of the present invention, at least one of a plurality of specifications included in all the products handled is used as a search condition. Therefore, the user can quickly search for a product having desired specifications.

When the "search" button displayed in FIG. 6 is clicked, the server 10 searches the product database 15 using the selected specification as a search condition. The following two search examples are shown in the product database 15 shown in FIG.

[0028] Next, when the user selects “How to use”, in FIG. 7, the user operates the terminal 20 to display the “budget” and “type (form)” search items in the same manner as in FIG. Check at least one check box for each of a plurality of price ranges and types. Further, the user checks at least one check box of a desired usage from a search item of “usage” (purpose of use).

"How to use" includes, for example, "I want to make a music CD", "I want to take a picture with a CCD camera", "I want to cooperate with MD", "I want to edit digital video", "DVD".
Specifically, the user wants to use the product. The product specifications required for each of the above uses are as follows. For example, when "I want to make a music CD", it is necessary that the product specifications include a CD-R drive and music creation software installed. Also, "I want to take a picture with a CCD camera"
In this case, it is necessary that a CCD camera is built-in (or attached). If you want to work with MD, MD (Mini Disk)
It is necessary to provide an optical terminal for connecting to a player / recorder. "I want to edit digital video"
In this case, it is necessary to provide an IEEE interface for connecting to digital video. further,
If you want to watch movies on DVD, you need to have a DVD-ROM drive. The product database 15 stores a use purpose-specification correspondence table that associates the set “usage method” (purpose of use) with the product specifications required for the purpose.

FIG. 12 shows an example of a purpose-of-use correspondence table. The specifications required for each method of use are associated. If the purpose of use is "I want to make a music CD", two specifications are required: a built-in CD-R drive and installation of music software.
When two specifications are set, these two specifications can be regarded as one specification. Therefore, in the correspondence table, for example, it is sufficient to correspond only the specification “built-in CD-R” as the specification corresponding to the purpose of use “want to make a music CD”. Of course, multiple specifications are required for a certain purpose of use, and in product design,
When those specifications are not set, it is necessary to associate a plurality of usage purposes with one usage purpose.

When the "search" button displayed in FIG. 7 is clicked, the server 10 acquires the above-mentioned specifications necessary for executing the designated use method from the correspondence table of FIG. Product database 15 based on
Search for.

As described above, according to the embodiment of the present invention, even if the user does not know the specification corresponding to the desired operation, the user can specify the desired operation (purpose of use) to obtain the necessary information for the intended purpose. Products with specifications can be found.

The server 10 converts the product data that matches the search condition into an HTML file, transmits it to the terminal 20, and displays it on the screen (S13). FIG. 8 is an example of a search result screen corresponding to FIG. Note that FIG. 8 shows a search result when “display” and “release time” are set as search conditions in addition to “CPU” as specification items. FIG. 9 is an example of a search result screen corresponding to FIG.

In FIG. 8 or FIG. 9, in the lower half of the screen, a list of the names of the products extracted by the search and the outline of the specifications are displayed as the search results. Specifically, as shown in the figure, the release time of each product, series name, product name, model name, main pre-installed software,
The type of CPU, the memory capacity, the hard disk capacity, the type of display, the presence / absence of a CD-ROM or DVD-ROM drive, and the like.

As described above, only the products having the specifications desired by the user or the products that the user can do are displayed from among all the products, so that the desired product can be easily found from a large number of products. Can be.

Thereafter, when the user clicks “Details / Purchase” of the desired product in the search result list on the screen,
Based on the operation, the server 10 causes the terminal 20 to display the purchase screen of FIG. In FIG. 10, the user inputs the purchase quantity and then clicks “Add to Cart”. In response to this operation, the server 10 temporarily stores product data corresponding to the selected product in an order reception file (cart file) (not shown), and
The first purchase confirmation screen is displayed on the terminal 20. In FIG. 11, when the user clicks “purchase”, the server 10 moves the product data stored in the order reception file to a purchase file (not shown). Thereby, the purchase is confirmed, and a known purchase procedure is executed.

Next, a second embodiment of the present invention will be described. In the second embodiment, when the user purchases an accessory (peripheral device) of the main product (personal computer) on the Internet sales site, the server 10 sets the predetermined operation check table from among a large number of accessory products. Based on the search, the terminal 20 displays an accessory product whose operation has been confirmed for the designated main product. Attached products include, for example, additional memory for computers, scanners,
Printers, auxiliary storage devices (external hard disk, internal hard disk, MO drive, etc.), communication devices (TA, modem), etc.

FIG. 13 is a flowchart of the second product selection processing of the present invention in the server 10, and FIGS. 14 to 21 are examples of screens displayed on the terminal 20 corresponding to each step. FIG. 13 will be described with reference to FIG. 14 to FIG. In the following, a case will be described where an accessory product corresponding to the main product selected and purchased in the above-described first product selection process is purchased.

After the main product to be purchased is designated, clicking "Purchase of peripheral equipment" on the screen shown in FIG.
As shown in FIG. 14, a large item menu and a medium item menu of the peripheral device are displayed. Here, it is assumed that the user has selected the medium item “inkjet printer” (not shown) from the large item “printer”.

When the type of the peripheral device is selected at the terminal 20 (S20), the server 10 refers to the operation check table stored in advance and refers to the designated main unit among the peripheral devices of the selected type. A search is made for a peripheral device whose operation has been confirmed for the product (S21). FIG. 18 shows an example of the operation check table.

The server 10 converts the product data corresponding to the peripheral device matching the search condition into an HTML file, transmits the HTML file to the terminal 20, and displays it on the screen (S22).
FIG. 15 is an example of a search result screen. In FIG. 15, a list such as a product name, a model name, and a price of the peripheral device extracted by the search is displayed as a search result in a lower half of the screen.

As described above, in the second embodiment of the present invention, the operation of the specified main body product is confirmed from among the many attached products (peripheral devices) registered in the product database 15. Since only the attached accessories that have been taken are displayed, the user can easily find an accessory that can be connected to the main product. Further, it is possible to prevent the user from selecting an accessory product that does not operate with the main product specified by mistake.

Thereafter, the purchase procedure is the same as described above. That is, when the user clicks “Details / Purchase” of a desired product from the search result list on the screen of FIG. 15, the server 10 displays the purchase screen shown in FIG. Let it. In FIG. 16, the user inputs the purchase quantity and then clicks “add to cart”. In response to this operation, the server 10 temporarily stores product data corresponding to the selected product in an order reception file (cart file). Further, in FIG.
The server 10 moves the product data stored in the order reception file to the purchase file based on the user's click on the “purchase” button. As a result, the purchase is confirmed, and the server 10 causes the terminal 20 to display a payment screen (not shown) for allowing the user to input a payment method and the like.

Incidentally, the user can see the screen shown in FIG.
It can be checked whether the searched peripheral device can be connected to another main product. The user inputs a model name of a predetermined main body product in an input field below “determine whether the device is a peripheral device corresponding to the specified main body” on the screen of FIG. 17 and clicks an “execute” button. In response to this operation, the server 10 refers to the operation check table of FIG. 18 to determine whether the selected peripheral device has been checked for operation with respect to the input main product.

When the operation has been confirmed, "judgment result OK" shown in FIG. 17A is displayed over the screen shown in FIG. If the operation has not been confirmed, the “judgment result NG” shown in FIG. 17B is displayed on the screen of FIG.

In the present embodiment, first, a main product to be purchased is designated, and peripheral devices compatible with the designated main product are displayed. However, the present invention is not limited to this. The user may simply input identification information for specifying the main product such as a model name, and display the peripheral device corresponding to the main product indicated by the identification information. However, in the above-described embodiment, since the identification information of the main product is not input by the user, it is possible to prevent the user from erroneously inputting the identification information.

The scope of protection of the present invention is not limited to the above embodiments, but extends to the inventions described in the claims and their equivalents.

[0048]

As described above, according to the present invention, in a product sales via the Internet, a product to be sold is searched based on the purpose of use of the product. Then, a product satisfying the search condition is displayed on the Internet terminal. This makes it easier for the user to select a product. When selecting an accessory product to be connected to the main product, the accessory product whose operation has been confirmed for the main product is displayed on the Internet terminal. This makes it easier for the user to select a product. In addition, it is possible to prevent the user from erroneously purchasing an accessory product that does not match the main product. Further, a product to be sold is searched based on the specification of the product. This also facilitates product selection.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of a computer network according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration example of a server 10.

FIG. 3 is a flowchart of a first product selection process of the present invention in the server 10.

FIG. 4 is an example of a screen displayed on a terminal 20 in a first selection process.

FIG. 5 is an example of a screen displayed on a terminal 20 in a first selection process.

FIG. 6 is an example of a screen displayed on the terminal 20 in the first selection process.

FIG. 7 is an example of a screen displayed on a terminal 20 in a first selection process.

FIG. 8 is an example of a screen displayed on the terminal 20 in the first selection process.

FIG. 9 is an example of a screen displayed on the terminal 20 in the first selection process.

FIG. 10 is an example of a screen displayed on a terminal 20 in a first selection process.

FIG. 11 is an example of a screen displayed on the terminal 20 in the first selection process.

FIG. 12 is an example of a use purpose-specification correspondence table.

FIG. 13 is a flowchart of a second product selection process according to the present invention.

FIG. 14 is an example of a screen displayed on a terminal 20 in a second product selection process.

FIG. 15 is a screen example displayed on the terminal 20 in the second product selection process.

FIG. 16 is an example of a screen displayed on the terminal 20 in the second product selection process.

FIG. 17 is an example of a screen displayed on the terminal 20 in the second product selection process.

FIG. 18 is an example of an operation check table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Server 11 Control device 12 Communication device 13 Main program file 14 HTML file 15 Product database 20 Client terminal

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 17/60 ZEC G06F 17/60 ZEC (72) Inventor Chichiro Hayashi 4-chome Kamiodanaka Nakahara-ku Kawasaki City Kanagawa Prefecture No. 1 Fujitsu Limited (72) Inventor Naoki Kazekoshi 4-1-1 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture F-term within Fujitsu Limited 5B075 KK07 PR08 UU40

Claims (22)

[Claims] 1. A product search method for searching for a desired product, wherein a plurality of use purpose items related to the product are displayed, and the product is searched based on at least one use purpose selected from the items. A product search method characterized by displaying information of a product having a specification corresponding to a purpose of use. 2. The method according to claim 1, wherein a correspondence table between the purpose of use and specifications necessary to achieve the purpose is prepared in advance, and a specification corresponding to the selected purpose of use is obtained from the correspondence table. A product search method, wherein a product is searched using the acquired specification as a search condition. 3. A product search method in a product sales transaction via a network, wherein a plurality of use purpose items relating to a product are displayed on a user terminal, and based on at least one use purpose selected at the terminal. A product search method comprising: searching for a product; and displaying, on the terminal, information on a product having specifications corresponding to the selected purpose of use. 4. The product search method according to claim 3, wherein the network is the Internet. 5. A correspondence table according to claim 3, wherein a correspondence table between the purpose of use and specifications necessary to achieve the purpose is prepared in advance, and a specification corresponding to the selected purpose of use is acquired from the correspondence table. A product search method, wherein a product to be sold is searched using the acquired specification as a search condition. 6. A product search method for searching for a desired accessory product related to a main product, wherein a correspondence table between the main product and an accessory product that can be connected to the main product is prepared in advance, and based on the designated main product, A product search method comprising: searching a correspondence table; and displaying information of an attached product that can be connected to the designated main product. 7. The product search method according to claim 6, wherein the accessory that can be connected to the main product has been confirmed to operate when connected to the main product. 8. A product search method for searching for an accessory product of a main product sold through a network, wherein a correspondence table between the main product and an accessory product connectable to the main product is prepared in advance and selected at a user terminal. A product search method, wherein the correspondence table is searched based on the selected main product, and information on ancillary products that can be connected to the selected main product is displayed on the terminal. 9. The product search method according to claim 8, wherein the accessory that can be connected to the main product has been confirmed to operate by connecting to the main product. 10. The device according to claim 8, wherein the main product is a personal computer, and the accessory product is at least one of peripheral devices such as a memory, a scanner, a printer, an auxiliary storage device, and a communication device.
A product search method comprising: 11. The product search method according to claim 8, wherein the network is the Internet. 12. A server for providing a product sales transaction site on the Internet, comprising: a computer for executing a transaction via a terminal on the Internet and the Internet; Search means for searching the database based on at least one purpose of use selected by the terminal, and communication means for transmitting data of a product having specifications corresponding to the selected purpose of use to the terminal A computer device characterized by the above-mentioned. 13. A computer for providing a product sales transaction site for selling a main product and ancillary products on the Internet, wherein the computer device executes a transaction via a terminal on the Internet and the Internet. And storage means for storing a correspondence table of ancillary products that are confirmed to operate by being connected thereto; search means for searching the correspondence table based on the main product selected by the terminal; A communication device for transmitting data of an accessory product whose operation has been confirmed to the selected main product to the terminal. 14. A client terminal on the Internet, a server for providing a product sales transaction site on the Internet, and a computer device for executing transactions via the Internet, at least one use of a product selected by the selection operation. Communication means for transmitting target data to the server and receiving data of a product having a specification corresponding to the selected purpose of use from the server, and display means for displaying the received data of the product A computer device characterized by the above-mentioned. 15. A client terminal on the Internet, a server for providing a product sales transaction site for selling a main product and ancillary products on the Internet, and a computer device for executing transactions via the Internet. Communication means for transmitting data of the main product selected according to the operation to the server, and receiving data of an attached product that is confirmed to operate by connecting to the selected main product from the server, Display means for displaying the received data of the attached product. 16. A computer for executing a product sales transaction with a user via a network, wherein the terminal displays the purpose of use of the product to be sold on a terminal, based on at least one purpose of use selected at the terminal of the user. A computer-readable storage medium storing a program for searching a database of products to be sold and transmitting data of products having specifications corresponding to the selected purpose of use to the terminal. 17. A computer that executes a product sales transaction with a user via a network, specifies a main product at a user terminal, and connects the main product and the main product based on the main product specified at the terminal. Search for a correspondence table with the accessory products that have been confirmed to operate as described above, and transmit the data of the accessory products whose operation has been confirmed to the specified main product to the terminal. A computer-readable recording medium on which a program is recorded. 18. A server for providing a product sales transaction site on the Internet, comprising: a terminal on the Internet and a computer device for executing transactions via the Internet; A computer comprising: a search unit that searches the database based on at least one specification selected by the terminal; and a communication unit that transmits data of a product having the selected specification to the terminal. apparatus. 19. A computer that executes a product sales transaction with a user via a network, causes a terminal to display specifications relating to a product to be sold, and, based on at least one specification selected at the terminal of the user, A computer-readable storage medium storing a program for searching a database of products to be sold and transmitting data of the product having the selected specification to the terminal. 20. A program executed by a computer for executing a product sales transaction with a user via a network, wherein a process of displaying a purpose of use of a product to be sold on a terminal, and a process selected at the terminal of the user A process for searching a database of products to be sold based on at least one use purpose, and a process of transmitting data of a product having specifications corresponding to the selected use purpose to the terminal. Program to do. 21. A program executed by a computer for executing a product sales transaction with a user via a network, comprising: a process for designating a main product at a user terminal; and a process based on the main product designated at the terminal. A process of searching a correspondence table between the main product and an attached product that is confirmed to operate by connecting to the main product; and transmitting the data of the attached product whose operation is confirmed to the specified main product to the terminal. And a process of transmitting the program to a computer. 22. A program executed by a computer for executing a product sales transaction with a user via a network, wherein a process for displaying specifications relating to a product to be sold on a terminal; A program comprising: a process of searching a database of products to be sold based on one specification; and a process of transmitting data of a product having the selected specification to the terminal.