- parallel processing system
- parallel processor
- parallel product
- parallel profile
- parallel programming
- parallel programming language
- parallel programming model
- parallel projection
- parallel projection method
- parallel proportional profile
- parallel prose
- Parallel Proses of Six Dynasties
- parallel quadrilateral
- parallel random access machine
- parallel random access machine, PRAM
- parallel reaction
- parallel reactions
- parallel real-time processing
- parallel redundancy
- parallel replica molecular dynamics
- parallel resonance
- parallel resonance circuit
- parallel retrieval
- parallel ruler
- parallel run