Page "IBM Series/1" Paragraph 14

The ' Class I ' systems were classified as mainframe systems – and the Series / 1 systems that provided field input to them – that were maintained at and distributed from the three CDPAs.

The chief among these were JUMPS / MMS ( Joint Uniform Military Pay System / Manpower Management System ), SASSY ( Supported Activities Supply SYstem ), and MIMMS ( Marine Corps Integrated Maintenance Management System ).