Re: GRiD
I still have a GRiD (an 110x Compass - the original model) as well as a later GRiDCase (which ran MS-DOS as well as GRiD-OS). The Compass WAS awesome - it had absolutely no moving parts - neither disk (bubble memory for permanent storage), nor fans (convection from the mag-alloy case for cooling), had 1Mb of RAM (when IBM were saying no one would ever need more than 640kb), OS and most apps in PROM, a fully graphical interface, a proper pre-emptive multi-tasking operating system in GRiD-OS (based on iRMX), and IEEE488 (HP-IB) and RS232 interfaces. All for a bargain entry price of £5,000 in 1983!
The original specs were DoD-inspired - it had to capable of being dropped and run over by a truck without damage, however, when NASA first used it to augment the 60s/early 70s computing designed into the Shuttle, they failed to anticipate that the no-moving parts convection cooling didn't work so well in zero-gravity! Later models included a fan...