Edited sentence: CADE Computer Assisted Data Entry.COS Concurrent operating system; ran on 9200, 9300 (32K systems).NCOS Non-Concurrent operating system; ran on 9200, 9300 (32K systems).Never sold in production.OS/3 Ran on 90/30 model.OS/4 Ran on 9400.OS/7 Ill-fated real memory system for 9700.Ran on 1900 model (OEM from Pertec).So they could (almost) run the same Assembler code.The Program Status Word (PSW) was slightly different.The RCA Spectra and Univac 90 series used the same architecture and instruction set as IBM 360/370.There were some differences.VS/9 Derived from RCA VMOS; virtual memory; ran on 90/60, 90/70, 90/80.Was canned in favor of VS/9.When VMOS was adapted by Univac to run on the 90, there was always some confusion in the Supervisor code as to whether one was dealing with Spectra-style or Univac-style PSW bits