Genealogy of Fujitsu Operating Systems

USAC 3010/5010 Machine language with symbolic instruction
USAC 720/10 Basic software BMOS CPS80 CSP/F1 FACOM 230-10 
 Basic software FACOM 230-15 SPIRAL UNIOS/F1 CSP/F3 UNIOS/F2 CSP/FX ASP(Enn series) ASP(Vnn series) UNIOS/F4 UNIOS/F5 CSP/F5