Cambridge Z88

After Amstrad bought the Sinclair computer business in 1986, Clive Sinclair started again under a new company, Cambridge Computer, and the Z88 (1987) was its first product — a genuinely portable machine, light enough to fit in an A4 envelope, built almost entirely from CMOS chips so it could run for weeks on four AA batteries. Its flat membrane-style keyboard drew criticism, but the machine itself — with PipeDream (spreadsheet, word processor and database in one) baked into ROM — found a real following among journalists and writers who wanted something to type on away from a desk, years before that was a mainstream idea.

Reference photo: Wikimedia Commons (“Cambridge-Z88.jpg” by Evan-Amos), Public Domain.