My main focus is on the IBM PC, the Amiga and the C64. I collectively refer to computer games that appeared on a micro as its computer-game catalogue. In classic computer-game language Western computer-game machines include 8, 16 and 32 bit micros manufactured by Acorn, Apple, Commodore and others. My commentary does not refer to IBM PCs as micros, but rather as IBM PCs, IBM PC compatibles or simply PCs. As a rule, IBM PCs are too physically big to be referred to as micros.Conversely, in the sphere of computer-gaming the Amiga, the Archimedes and the ST were only very rarely referred to as PCs back in the day, even though they most certainly were personal computers whose high-end variants were audio, science or graphics workstations (e.g., the NewTek Video Toaster of 1990 on the Amiga 2000). But my commentary on home computers is restricted to their role as computer-game machines.For me, the general term home computer encompasses both microcomputers and PCs. Home computers are constrasted with computers that are not typically used as home appliances, such as minicomputers, mainframes, arcade machines, terminals and workstations.cf.