PCS may refer to: Military Permanent change of station, to be permanently moved to a new post in the U.S. armed forces Personal Clothing System, designation of British Army No. 8 Combat Dress Patrol Craft Sweeper, a class of World War II U.S. Navy vessels, including: USS PCS-1376, the lead ship of her class USS PCS-1379, the fourth of twelve Organizations Communist Party of El Salvador (Partido Comunista de El Salvador), a political party in El Salvador Partito Comunista Sammarinese (Sammarinese Communist Party), a former political party in San Marino PhillyCarShare, a defunct non-profit organization in Philadelphia, US, acquired by Enterprise in 2011 Polish Council of State, supreme political body of Poland from 1947 to 1989 Portland Center Stage, a theater company based in Portland, Oregon, US since 1988 Potash Corporation of Saskatchewan, a former Canadian producer of potash Provincial Civil Service, Uttar Pradesh, India Provo Canyon School, a US psychiatric youth residential treatment center Public and Commercial Services Union, a trade union representing UK public sector workers Education Pacific Collegiate School, a grades 7–12 charter school in Santa Cruz, California, US Petaluma City Schools, the school district of Petaluma, California, US Presbyterian Christian School, a private school in Hattiesburg, Mississippi, US Professional Children's School, a college preparatory school for child actors and dancers in New York City, US Pueblo City Schools, the school district of Pueblo, Colorado, US Science and technology Partitioning Communication System, a high-assurance communications security technology Periphere Computer Systeme, a German manufacturer of UNIX-based computers in the 1980s and 1990s Personal Communications Service, a set of wireless communications capabilities Photon correlation spectroscopy, a spectroscopic technique in chemistry and physics used to determine particle sizes in suspensions Physical coding sublayer, an Ethernet Layer 1 (PHY) sub-layer Picture communication symbols, drawings used to communicate with autistic people and in other alternative communication systems Plastic-clad silica fiber, a type of optical fiber Process control system, for industrial process control Profile connection space, an intermediary form for color-data used when performing conversions between color spaces Medicine Pelvic congestion syndrome, a cause of chronic pain in the abdomen Post-concussion syndrome, a set of symptoms that a person may experience after a concussion Post-COVID syndrome, symptoms that develop and continue for a long time after COVID-19 Postcholecystectomy syndrome, the presence of abdominal symptoms after surgery to remove the gallbladder Precordial catch syndrome, a common cause of chest pain complaints in children and