PCB may refer to:
Science and technology
- Polychlorinated biphenyl, an organic chlorine compound, now recognized as an environmental toxin and classified as a persistent organic pollutant
- Printed circuit board, a board used in electronics
- Plenum chamber burning, in some jet engines
- Papillary carcinomas of the breast, rare forms of the breast cancers
Computing
- PCB (software), software to design printed circuit boards
- PCBoard, bulletin board software for MS-DOS
- Process control block, an operating system data structure
- Precompiled Binary
Organizations
- Pacific Coast Borax Company, an American mining company
- Pakistan Cricket Board, national regulatory board for cricket in Pakistan
- Partido Comunista Bolchevique, the Bolshevik Communist Party in Mexico in the 1960s
- Parti Communiste de Belgique, the Communist Party of Belgium until 1989
- Parti Communiste de Belgique (1989), one of the successors to that party
- Partido Comunista de Bolivia, the Communist Party of Bolivia
- Partido Comunista Brasileiro, the Brazilian Communist Party
- PCB Piezotronics, a manufacturer of piezoelectric sensors
- Police Complaints Board, in England and Wales
Places
- Panama City Beach, Florida, US
- Pondok Cabe Airport (IATA code), Indonesia
Other uses
- Penetration-cum-blast, ammunition type for the Arjun tank's 120mm cannon
- Pablo Carreño Busta, Spanish tennis player
- Perfect Cherry Blossom, the seventh official game in the Japanese Touhou series by ZUN
- Public call box, a telephone booth
- PCB, Bible translations into Persian 1995
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