Medicine: Picture communication symbols, drawings used to communicate with autistic people and in other alternative communication systems Post-concussion syndrome, a set of symptoms that a person may experience for weeks, months, or even years after a concussion 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 adolescents Military: Peace and conflict studies, an inter-disciplinary inquiry into war 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 USS PCS-1379 Organizations: Pacific Collegiate School, a grades 7-12 charter school in Santa Cruz, California Partito Comunista Sammarinese (Sammarinese Communist Party), a former political party in San Marino Personal Communication Sector, former name of Motorola Mobility as a division of Motorola PhillyCarShare, a non-profit organization providing car sharing services in the Philadelphia area Polish Council of State, supreme political body of Poland from 1947 to 1989 Portland Center Stage, a theater company based in Portland, Oregon since 1988 Potash Corporation of Saskatchewan, a Canadian corporation that is the world's largest producer of potash Presbyterian Christian School, a private school in Hattiesburg, Mississippi Professional Children's School, a not-for-profit, college preparatory school for working or aspiring child actors and dancers, based in New York City Public and Commercial Services Union, a trade union representing UK public sector workers Pueblo City Schools, the school district of Pueblo, Colorado Science and technology: Partitioning Communication System, a high-assurance communications security technology Patni Computer Systems, a provider of information technology services Periphere Computer Systeme, a German manufacturer of UNIX-based computers in the 1980s and 1990s Personal Communications Service, a set of wireless communications capabilities that allows some combination of terminal mobility, personal mobility, and service profile management. E.g. Sprint PCS mobile phone service. Photon Correlation Spectroscopy Physical Coding Sublayer, an Ethernet Layer 1 (PHY) sub-layer Plant Cell Structure Polar coordinate system, a 2D or 3D coordinate system, determined by an angle and a distance Power & Communication System, also called power/data grommets, convenience outlets for cables in furniture Process Control System Parsecs, units of measurement used in astronomy Profile connection space, an intermediary form for color-data used when performing conversions between color spaces Plastic-clad silica fiber, a type of optical fiber Other uses: Pacific Central Station, a railway station in Vancouver, British Columbia Photo City Sagamihara, awards for photography given annually by the Japanese town of Sagamihara Pinball Construction Set, a computer game by Bill Budge published by Electronic Arts Program Component Score, part of the ISU Judging System for figure skating competitions Preferential creditor status, also called preferred creditor