A keypad in which output keystrokes are determined both from individual
switch activation and from the combined activation of adjacent switches.
The keypad has a substrate carrying an array of sense elements arranged
to change state in response to keypad operation, a flexible cover
disposed above the substrate and having an exposed surface defining an
array of independent key regions, with combination key regions defined in
interstices between adjacent independent key regions. Snap elements
provide tactile feedback. Some versions have a touch-sensitive grid
rather than a switch matrix. A method of dialing a telephone includes
generating a corresponding sequence of numerals by transposing alpha
character input into one of the numerals 2 through 9 according to
standard telephone keypad letter-number correspondence