Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Abacus(also: Cranmer Abacus, Counting Frame)
- A manual calculating tool consisting of a frame with rods and movable beads used for arithmetic operations. For visually impaired users, adapted versions like the Cranmer abacus feature beads that stay in place when moved and a backing to prevent displacement. The abacus enables…
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