HP 300

The HP300 was cut-short from being a commercial success despite the huge engineering effort, which included HP-developed and -manufactured silicon on sapphire (SOS) processor and I/O chips.

Later, the HP300 design team developed multi-user abilities, and an ahead of its time inter-unit processor interconnect that let one HP300 change registers in other inter-connected HP300's system.

The circuit boards were in a floor pedestal box, with CRT on top with built-in soft keys, and fixed keyboard protruding in front.

It pioneered such ideas as built-in networking, automatic spelling correction, multiple windows (on a character based screen), and labels adjacent to vertically stacked user function keys, now used on ATMs and gas pumps.

HP built two semi-truck loads of units before shutting down the HP300 production line to meet customer contractual agreements (i.e.: in case LLNL wanted more Amigos).