The Amstrad CPC 6128 was a 1980s home computer. It was the up-market sibling to the Amstrad CPC 464, although its direct ancestor was the Amstrad CPC 664, which had only half as much RAM. Instead of a tape deck, it had a 3" disk drive. It also had 128KB RAM instead of 64 and an updated version of the BASIC. Unfortunately, disk games were expensive, so most people bought tapes and put them on disk by way of a Multiface. This was a device you plugged into the back of your machine and could sometimes squeeze six games on a disk, so you saved quite a bit of money.
CPC stood for 'Colour Personal Computer', although it was possible to purchase a CPC with a green screen (GT65/66) as well as with the standard colour screen (CTM640).
Amstrad initially promoted the CPC as being an improvement on the competing ZX Spectrum and C64 because it was a complete system - including everything required to use the machine in one box.
Amstrad's idiosyncratic choice of Hitachi's 3" floppy disk drive, when the rest of the PC industry was moving to Sony's 3.5" format, is often claimed to be due to Amstrad bulk-buying a large consignment of 3" drive units in Asia.