Of Japan’s electronic giants, Sony led the field in the manufacturer of micro-cassette driven dictation machines, but was conspicuous by its absence in the office and home electronic typewriter market, concentrating instead on the microcomputer market.

Sony’s only contribution to the electronic typewriter/word processing market was the Typecorder, an $800 portable “keystroke capture device” introduced in 1981, and sold as part of the Sony Series 35, which included a display screen, printer, and external dual 3.5 inch floppy disk drives. For editing, a micro-cassette was inserted into a slot on the keyboard and the recorded text then appeared on screen.