SDS BASIC, also known as CP-V BASIC, Batch BASIC or Sigma BASIC depending on the version, is a BASIC programming language compiler for Scientific Data Systems's (SDS) Sigma series mainframe computers, originally released in 1967. Xerox purchased SDS in 1969 and began rebranding it as Xerox Data Systems, and finally just Xerox, at which time the language became known as Xerox BASIC. SDS BASIC is historically notable as the platform on which the original Star Trek computer game was written in the summer of 1971.