the airport for their holidays", and for the machine to not look like "a pregnant calculator" – in reference presumably to the ZX81 and ZX Spectrum with their low cost, membrane-type keyboards. CPC 464 The CPC 464 was one of the most successful computers in Europe and sold more than two million units. The CPC 464 featured 64 KB RAM and an internal cassette deck. It was introduced in June 1984 in the UK. Initial suggested retail prices for the CPC464 were GBP£249.00/DM899.00 with a green screen and GBP£359.00/DM1398.00 with a colour monitor. Following the introduction of the CPC6128 in late 1985, suggested retail prices for the CPC464 were cut by GBP£50.00/DM100.00. In 1990, the 464plus replaced the CPC 464 in the model line-up, and production of the CPC 464 was discontinued. CPC664 The CPC664 features 64 KB RAM and an internal 3-inch floppy disk drive. It was introduced on 25 April 1985 in the UK. Initial suggested retail prices for the CPC664 were GBP£339.00/DM1198.00 with a green screen and GBP£449.00/DM1998.00 with a colour monitor. After the successful release of the CPC464, consumers were constantly asking for two improvements: more memory and an internal disk drive. For Amstrad, the latter was easier to realise. At the deliberately low-key introduction of the CPC664, the machine was positioned not only as the lowest-cost disk system but even the lowest-cost CP/M 2.2 machine. In the Amstrad CPC product range the CPC664 complemented the CPC464 which was neither discontinued nor reduced in price. Compared to the CPC464, the CPC664's main unit has been significantly redesigned, not only to accommodate the floppy disk drive but also with a redesigned keyboard area. Touted as "ergonomic" by Amstrad's promotional material, the keyboard is noticeably tilted to the front with MSX-style cursor keys above the numeric keypad. Compared to the CPC464's multicoloured keyboard, the CPC664's keys are kept in a much quieter grey and pale blue colour scheme. The back of the CPC664 main unit features the same connectors as the CPC464, with the exception of an additional 12V power lead. Unlike the CPC464's cassette tape drive that could be powered off the main unit's 5V voltage, the CPC664's floppy disk drive requires an additional 12V voltage. This voltage had to be separately supplied by an updated version of the bundled green screen/colour monitor (GT-65 and CTM-644 respectively). The CPC664 was only produced for approximately six months. In