And the TRS-80 Model 100 (http://en.wikipedia.org/wiki/TRS-80_Model_100), which arguably pioneered the concept.

I wrote a novel on an Amstrad NC-100. It had a 1MB PCMCIA flash disk (from an Apple Newton!) and I saved a chapter at a time onto the disk (it only had 64KB of RAM) and I installed a new, clearer screen in it. Nice little machine!