Atari Computers, Inc. The great Atari and the handheld designed by Amiga luminaries and designers. Ironic in a way!
0
NEC Electronics NEC did not really give us much when it came to handheld's, though it did also manage to add a laptop PC-Engine to it's product range, just not in Europe.
0
Nintendo The great systems from the handheld kings.
3
Sega SEGA released several handhelds, and one that did not have a screen - does that count?
1
Sony Sony, perhaps known as the company that redefined console gaming (with a little help from Nintendo).
0
Various Handhelds Handy place to put all those handy little handhelds that really have no where else to go.