PCOS (disambiguation)

Polycystic ovary syndrome, or PCOS, is the endocrine disorder.

PCOS or variation, may also refer to:

Biology and medicine

 * Palliative Care Outcome Scale, a pain scale

Computer operating systems

 * PC OS, the operating system for a personal computer
 * PC/OS, or Black Lab Linux, a Linux distribution
 * Olivetti's PCOS, such as on the Olivetti M20

Other meanings

 * Comunitarian Party Option Seven (Spanish: Partido Comunitario Opción Siete), a political party in Colombia
 * Precinct count optical scan machine used in vote counting in the Philippines
 * Philharmonic Chamber Orchestra Society, now The Philharmonic Orchestra, Singapore