The Hyperion - the first PC portable (narrowly beat Compaq), cuter and smaller than the Compaq. Notable for it's *low* degree of IBM compatibility. [Actually it isn't *that* bad, but there are a few differences which prevent a number of poorly bahaved applications the wall floppy drive with reliability problems, and molding the bezel so that other drives could not be easily substituted. These two factors gave a bad taste to what was otherwise a very nice little machine. I'd also add the Portfolio, as the first MS-DOS palmtop, and possibly the T1000 as one of the earliest successful laptop format PCs. For strictly personal reasons, and moving away from "IBM PC's", I would vote for the Nabu 1600 - 8086 based, ran CP/M-86, MS-DOS, Xenix and eventually QNX, using serial consoles. I had about 1/2 dozen of them at one time, my first machine with a hard drive, and the first that ran a "real" multi-user system - but almost nobody has ever heard of them... Regards, -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html