Assistive products for calculation and training basic arithmetic

Abacuses, talking calculators etc. Computers and terminals, see 22 33.
22 15 06

Calculators

(5 product series)
E.g. calculators with speech output, large buttons, large display.

22 15 12

Assistive products for training and supporting the basics of arithmetic

(1 product series)
Products designed to assist in the acquisition of the conceptual link between the number of objects, figures and basic arithmetical operations.