Cos

Cos, COS, CoS, coS or Cos. may refer to:

==Mathematics, science and technology== Carbonyl sulfide Class of service (CoS or COS), a network header field defined by the IEEE 802.1p task group Class of service (COS), a parameter in telephone systems Cobalt sulfide COS cells, cell lines COS-1 and COS-7 Cosine, a trigonometric function Cosmic Origins Spectrograph, a Hubble Space Telescope instrument