The Atom was a progession of the 6502-based machines that the company had been making from 1978. The Atom was a cut-down Acorn System 3[?] without a disk drive but with an integral keyboard and cassette tape interface, sold in either kit or complete form. It was priced at around £175.
It had a MC6847 VDU video chip, allowing for text or two-colour graphics modes. It could be connected to a TV or modified to output to a video monitor. Basic video memory was 1 kbyte but could be expanded to 6 kbyte. A PAL colour card was also available.
It had built-in BASIC, although in an idiosyncratic version.
The Acorn LAN, Econet[?], was first configured on the Atom.
wikipedia.org dumped 2003-03-17 with terodump