The Atari Portfolio was the world’s first IBM compatible, pocket-sized computer, released in 1989. It was less than a foot long and about an inch thick (20cm x 10cm x 2.8cm to be exact). The screen size was equivalent to a textbox you’d find on an internet form, capable of displaying 8 lines of text, 40 characters each on the monochrome LCD screen.
It’s a simple computer running the “DIP” DOS operating system and includes programs such as a word processor, address book, spreadsheet and calendar.
As far as the guts, it ran a 4.9152 MHz 80C88 processor, had 128KB of RAM (with the memory expansion unit giving an additional 256KB) and 256KB of ROM. The pdf manual for this little guy is 4.1MB. Funny. (The picture actually shows the slot for the memory expansion card on the left.)
There’s a vibrant following for these little retro-computers including fan-clubs around the world. There are also several hacks. Some of which allow you to backlight the display and use a CF Card. Go to http://www.atari-portfolio.co.uk/ to find out more.