Acronyms 

PAPG
Peer Assessment Permanent Group
PAS
Publicly Available Specification
PC
Programming Committee
PCBC
Polish Centre for Testing and Certification
PICS
Protocol Implementation Conformance Statement
PIXIT
Protocol Implementation eXtra Information for Testing
PKN
Polish Committee for Standardization (National Member for Poland)
PNE
Rules for presentation of European Standards
POSAT
POSIX Agreement Group on Testing
POSI
Promoting Conference for OSI (Japan)
POSIX
unix-based operating system standardised by IEEE and ISO/IEC
PQ
Primary Questionnaire
prEN
Draft European Standard
prENV
Draft European Prestandard
PSDN
Packet Switched Data Network
PSTS
Profile Specific Test Specificiation
PT
Project Team
PTS
Profile Test Specification