Sharp began selling the kanji-enabled HAYAC-3800 office computer in June 1980. It was distinguished by its focus on usability and its office furniture design. It came as a desk that held Sharp's own simple multi-item input device (a sensor panel), a CRT, an eight-inch floppy disk drive, and a CPU. The HAYAC-3800 featured the industry's first voice-guidance system that read input instructions to operators so the computer would be easy to use even for first-time users. The voice instructions were pre-recorded on either a floppy disk or a magnetic drum and were selected and played as needed.
The computer ran on a 16-bit Z-8000 microprocessor, and Sharp's multitasking operating system permitted the simultaneous processing of dual jobs. Its programming languages were COBOL and the simple SCHIPOL language. This model was shown at the Hannover Messe exhibition in West Germany, and Sharp pushed it to break into foreign markets, particularly in the European market.