The 10-Digit Talking Calculator with Music and Alarm is a voice-output calculator designed for use by persons who are blind or have low vision. The calculator has a 10-digit liquid crystal display (LCD), with voice output for entries and results.
"Abacus Basic Competency: A Counting Method," by Susan M. Millaway, is an instructional manual designed for teaching skills in performing the four basic math operations on the abacus to children and adults who are blind or have low vision.
The Big Number Talking Calculator is a voice output large print calculator designed for use by individuals who are blind or have low vision. The calculator's visual display shows eight characters 0.5 inches high.