(= UNIX System Services, "UNIX-süsteemi teenused")

olemus
UNIXi teostus z/OS komponendina, optimeerituna suurarvuti arhitektuurile
= UNIX implementation optimized for mainframe architecture,
as a component of z/OS

ülevaateid
https://en.wikipedia.org/wiki/UNIX_System_Services
https://www.mainframes.com/Unix.html
https://share.confex.com/share/124/webprogram/Handout/Session17145/SHARE%20USS%20Ported%20Tools%20-%2015582.pdf