The 12-button alphanumeric telephone keypad is a prime example. The letters on each key–“ABC” on the 2 key, “DEF” on the 3 key, and so on–are a legacy of the 1920s, when phone numbers ...

A standard telephone keypad, with four rows of three keys each ... Each key typically has 3-4 letters on it. Predictive text entry is usually used to speed this process. See: Predictive Text ...

Typing text using a cell phone forces someone to work on nine tiny keys that could represent any of three letters at any time. By comparison, a full-sized keyboard has about four dozen keys ...

Translation on the telephone keypad: 486-5127. Before 1977, Chicago phone numbers were often listed as Jeffrey remembers. The letters, which signified longer words, had once stood for exchanges ...

Phone subscribers were given a unique five-digit number within their service area. These would be preceded by two digits, which were identified by letters, that denoted the telephone exchange you ...

WHOSE IDEA WAS it to put the * and the # on the touch tone telephone? It might not be the most urgent issue of our time but it matters a lot to me because I grew up believing that the man ...

His research in telephone keypads was also eventually adopted into a range of devices, including ATMs, gas pumps and medical equipment, the Times adds. Karlin's keypad design resulted from ...