G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B19/00—Teaching not covered by other main groups of this subclass
G09B19/02—Counting; Calculating
G09B19/025—Counting; Calculating with electrically operated apparatus or devices
Landscapes
Business, Economics & Management
(AREA)
Engineering & Computer Science
(AREA)
Entrepreneurship & Innovation
(AREA)
Physics & Mathematics
(AREA)
Educational Administration
(AREA)
Educational Technology
(AREA)
General Physics & Mathematics
(AREA)
Theoretical Computer Science
(AREA)
Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation
(AREA)
Financial Or Insurance-Related Operations Such As Payment And Settlement
(AREA)
Diaphragms For Electromechanical Transducers
(AREA)