 Legend has it that the 1604 designation was chosen by adding CDC's first street address (501 Park Avenue) to Cray's former project, the ERA-Univac 1103.A 12-bit cut-down version was also released as the CDC 160A in 1960, often considered among the first minicomputers.The 160A was particularly notable as it was built as a standard office desk, which was unusual packaging for that era.