- P2P
- Packet INternet Grouper
- Packeting
- Pageview
- PAP
- Password Authentication Protocol
- Patch
- Payload
- Payload-Trigger
- PDC
- PE Datei
- Peer
- Peer-to-Peer
- Perl
- Personal Identification Number
- PGP
- Phishing
- PIN
- Ping
- Point to Point Protocol
- Polygon
- Polymorphe Viren
- Pop-Up
- POP3
- Port
- Portable Document Format
- Post-Office Protocol 3
- Posting
- PostScript
- PPP
- Präfix / Prefix
- Pretty Good Privacy
- Primary Domain Controller
- Printer Access Protocol
- Private Key
- Protokoll
- Provider
- Proxy
- Public Key
- Pufferüberlauf
- Pulswählverfahren
