PACS

PACS is an acronym with several meanings:

Medicine

• Post-Acute COVID-19 Syndrome
• Partial Anterior Circulation Stroke Syndrome, the symptoms of a type of an ischemic stroke
• Picture Archiving and Communication System, a system used in medical imaging to store, retrieve, distribute, analyze, and digitally process medical images.

Organizations and establishments

• Pacte civil de solidarité, a form of civil union in France
• Palo Alto Chinese School, Palo Alto, California, USA
• Poorest Areas Civil Society Program (2001–2008), a defunct Indian social welfare program
• Primary Agricultural Credit Society, co-operative credit institutions in India
• Provisional Army of the Confederate States, the "volunteer" or wartime-expansion component of the Confederate States Army

Child psychology

• Phonological Assessment of Child's Speech, a type of analysis battery used in developmental psychology to ascertain if a child has a reading disorder.
• Phonological Awareness Composite Scores, a marking criterion as part of the CTOPP assessment battery for assessing a child's awareness of the oral structure of language.

Physics and astronomy

• Physics and Astronomy Classification Scheme, a scheme developed by the American Institute of Physics
• Photodetecting Array Camera and Spectrometer, an instrument of the Herschel Space Observatory

PACs

PACs is the plural of PAC; for example:

• Political action committees, groups organized to elect or defeat political candidates
• Premature atrial contractions

Other

• Primary airport control station, a survey marker established in the vicinity of an airport
• Personal access control system. Gates, barriers and turnstiles that provide security for restricted areas on buildings and sites.
• Cape Sarichef Airport (ICAO airport code), on Unimak Island of the Aleutian Islands, Alaska
• Peace and conflict studies, an academic field that identifies and analyzes violent and nonviolent behaviors of social conflicts