O.S.
See also:
Appendix:Variations of "os"
Translingual
Symbol
O.S.
alternative form of
OS
English
Noun
O.S.
(
countable and uncountable
,
plural
O.S.'s
)
Alternative form of
OS
.
Anagrams
SO
,
S/O
,
s.o.
,
so
,
So
,
So.
,
S&O
,
s/o
,
S.O.