P.S. means Post Script or after writing(Post=after,Script=writing). P.S.S would probaly be just some over use of it.
WHO is the World Health Organisation.
"Access Server", "Aortic stenosis", "Adult swim" and "ActionScript"
"[Windows] Millennium Edition", "Memory Effect" and "Myalgic Encephalomyelitis"
Initially, in the world of the characters in the novel, the A stands for adultery. The meaning, however, changes as the plot progresses and some in the story regard the A as meaning angel. From the...
Information Technology. There may be other abbreviations.