Sharp PC-1211 pocket electronic programmable computer (c.1980). It was also sold as the RadioShack/Tandy TRS80 PC-1. It was the first hand-held pocket computer to allow programming in the BASIC language. It could be connected to a cassette recorder by an adapter cradle which allowed programs to be saved to audio cassettes. A printer and cassette adapter was also available. It was introduced in 1980.