 The teleputer 1 was a very simple device and only worked as a teletex terminal, whereas the Teleputer 3 was a z80 based micro computer.It ran with a pair of single sided 5¼ inch floppy disk drive; a 20Mb Hard disk drive version was available towards the end of the product's life.The operating system was CP/M or a proprietary variant CP*, and the unit was supplied with a suite of applications, consisting of a word processor, spreadsheet, database and a semi-compiled basic programming language.