Sign language for communicating with another person or electronic calculator has series of main keys on side not facing user and reading keys transmitting tactile sensations to fingers of user

摘要

Keyboard (2) allows communication with electronic calculator distant or integrated to keyboard housing. Keyboard has series of main keys (22) simultaneously accessible with fingers of same hand. Four keys (220 to 223) are placed on side (27) not facing user. Key (224) is reached with thumb, and is placed on edge (28) facing user. Reading keys, placed near or inside entry keys (220, 224, 222'), can simultaneously transmit tactile sensations to different fingers of user. An Independent claim is also included for the method for using keyboard.