VS1 may refer to: *VS1, a V speed in aviation *VS1, a grade of
Diamond clarity Diamond clarity is the quality of Diamond (gemstone), diamonds that relates to the existence and visual appearance of internal characteristics of a diamond called ''inclusions'', and surface defects, called ''blemishes''. Clarity is one of the fou ...
OS/VS1 Operating System/Virtual Storage 1, or OS/VS1, is a discontinued IBM mainframe IBM mainframes are large computer systems produced by IBM since 1952. During the 1960s and 1970s, IBM dominated the large computer market. Current mainframe compute ...
, an operating system {{Letter-NumberCombDisambig