Vos or VOS may refer to:
In computing:
- Hitachi VOS, a mainframe computer operating system by Hitachi Data Systems
- Stratus VOS, a fault-tolerant computer operating system, developed by Stratus
- Virtual Object System, a free and open platform for multiuser 3D virtual reality and interactive, collaborative 3D virtual spaces
- Virtual Orchestra Studio PC video game, 1997
- Virtual Operating System An Virtual Operating System made with YYGM (Yoyo game maker)
- Veritas Operations Services, a web-based suite of services
Other uses:
- Verb–object–subject, in linguistic typology
- Voluntary observing ship program, in meteorology
- Vos (surname), people with the surname Vos
- Vos (Spanish), a second person singular pronoun, used in place of tú in some countries
- V.O.S. (Spanish), "versión original subtitulada", a movie in original version with subtitles
- V.O.S, a K-pop South Korean boy band
- Vintage Original Spec, a series of Gibson custom historic solidbody guitars
- v.o.s. Czech company designator (veřejná obchodní společnost), similar to inc./LLP/LLC