PID

PID stands for a number of things, including those mentioned below.

Medicine

• Prolapsed intervertebral disc, commonly called a "herniated disc"
• Primary immune deficiency
• Pelvic Inflammatory Disease (or Pelvic Inflammatory Disorder), an infection and inflammation of the female uterus, fallopian tubes, and/or ovaries

Business

• Project Initiation Document defines all major aspects of the project and forms the basis for its management and the assessment of overall success

Technology

• Photoionization detector
• Process identifier, a number used by Unix kernels and Windows operating systems to identify a process
• Personal Identifiers, a subset of PII data elements that identify a unique individual and can permit another person to “assume” that individual’s identity without their knowledge or consent.
• Portable Information Device
• PID controller, a control concept used in automation. (Proportional/Integral/Derivative)
• Piping and instrumentation diagram, a technical diagram showing all (or a part of) pipelines, instruments, valves, etc., of a process plant
• Process and instrumentation diagram
• Passive Infrared Detector, a PIR-based motion detector
• Personal Integrating/Indicating Dosemeter, a type of dosimeter for personal use
• Packet Identifier, a 13-bit field in a transport stream packet
• Product Identification - The unique serial number for a copy of an operating system or software application. Often the action of setting the software's product key as part of product activation will set the PID for the installed software.

Organizations

• Protective Intelligence Division, a part of the United States Secret Service
• Police Intelligence Department, a staff department of the Singapore Police Force
• Political Intelligence Department, a British clandestine body created to produce and disseminate propaganda during WWII

Other

• Packet ID, used to identify audio/video streams in DVB "Digital Video Broadcasting"
• Pathways Into Darkness, a 1993 video game by Bungie Studios
• Parameter ID, in automotive repair, PIDs are requests for data through an OBD connector
• Paul Is Dead, a rumor in the 1960s that led fans to believe that Paul McCartney was actually dead
• Physician Induced Demand
• Principal ideal domain, in abstract algebra, an integral domain in which every ideal is principal
• "Poverty, Ignorance and Disease", cite in "None Dare Call it a Conspiracy" by Gary Allen.