The Amiga system was introduced in 1985 by Commodore Business Machines. The first model, the Amiga 1000, boasted 6 bit colour, a standard resolution of 640*256, 8 bit stereo sound, 256 Kb of RAM and a revolutionary GUI-based operating system (Workbench); many models followed, the most advanced being the A4000, introduced in 1992, which had 8 bit colour, 4 Megabyte RAM (expandable) and built-in IDE interface. Eventually Commodore went bankrupt due to its incapability to market the Amiga as anything else than a games machine, despite its revolutionary Operating System. Nowadays the machine has a loyal following and plans are underway to design a next-generation system based on it.

Covering all the computer systems from Apple, including Apple II, Lisa and Macintosh.

Sites about "handheld" computers, those small enough to be held in one hand, and used with the other, like calculators, but still flexible enough to run many different kinds of applications, like personal computers. Technically, handhelds come in two different kinds:

• "Palmtop" computers, like the original Psion, or IBM PC110 include a small built in keyboard.
• "PDAs", "Personal Digital Assistants", such as the original Apple Newton, or the Palm or Palm Pilot or most Windows CE machines, do not, and usually are used with a pen device writing or pointing on the screen. The name comes from the fact that most of these computers are used to organize personal information, short notes, addresses, etcetera.

However many people, even some supposedly knowledgeable industry sources, do not follow this distinction, and use the terms "Palmtop" or "PDA" interchangeably, to cover all handheld computers. In the ODP, to compromise, we use the correct name, "Handheld", for the category, but list both Palmtops and PDAs under it.

Sites related to Hewlett-Packard's HP 3000 and HP e3000 platforms including the MPE V and MPE/iX operating systems, application software, tools and utilities. Sites related to HP 3000 freeware, vendors, consultants, services, application software, user groups, conferences, and jobs are welcome.

MSX is a standard platform design which was licensed to many manufacturers and was quite popular in Japan, Holland and Spain, and later in Russia. There were 3 different generations and the last one, the MSX 2+, is regarded as the finest 8 bit computer ever made.

This category is for the line of Sinclair computers and their clones. Including but not limited to ZX80, ZX81, ZX Spectrum and QL and clones such as Timex-Sinclair, SAM Coupé, Pentagon 128, Scorpion and so on. Computers designed by Sir Clive such as the Z88 also falls under this category.

Tablet PCs are mobile computers with touch screen that enables handwriting recognition and ink. Tablet PCs run standard software just like a desktop personal computer. The term "Tablet PC" is the specification provided by Microsoft, where manufacturers must meet certain minimum hardware requirements. This category includes true Tablet PCs as well as substantially similar pen computers.