PID
- BBC Programme Identifier
- MPEG transport stream
- OBD-II PIDs
- P.I.D.
- PID controller
- PIDS (disambiguation)
- Partial information decomposition
- Party identification
- Passive infrared detector
- Pathways into Darkness
- Paul is dead
- Pelvic inflammatory disease
- Persistent identifier
- Photoionization detector
- Pid (video game)
- Pid Purdy
- Piping and instrumentation diagram
- Police Intelligence Department
- Political Intelligence Department (disambiguation)
- Politieke Inlichtingen Dienst
- Prague Integrated Transport
- Press Information Department
- Primary immune deficiency
- Principal ideal domain
- Process identifier
- Project Initiation Documentation
- Prolapsed intervertebral disc
- USB