The BBC Micro is a relatively unique example of a personal computer that uses a RISC (Reduced Instruction Set Computer) processor, fast and extremely power efficient, these became the processor of choice for the mobile electronics industry. With up to 32 Kb RAM, BBC Micro specifications were revolutionary. Programmes were loaded using an audio-cassette device and plug-in ROMs enabled the use of applications like word processor. An innovative teletext decoder could even download software sent by television signal.