(= 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