A portable computer that weighed 11 kg and cost $1795, produced by Osborne Computer Corporation in 1981. The Osborne 1 came with a five-inch screen, modem port, two 5 1/4 floppy drives and a battery pack. It came with the CP/M operating system, SuperCalc spreadsheet application, WordStar, word processing application, Microsoft MBASIC programming language and Digital Research CBASIC programming language.