Personal Communications Service Permanent Change of Station Personal Communications Services Personal Communication Services Permit Compliance System Physical Coding Sublayer Personal Computers Personal Communication Service Personal Communications System Portable Computer System Pointing Control System Personal Communications Systems Pressure Control Solenoid photon correlation spectroscopy Physics of Colloids in Space Pointing Control Subsystem primary control ship Process Control Systems Programmable Communications Subsystem Personal Communication System personal communication systems PERSONAL COMPUTER SYSTEM Power Conversion System Precision Control System primary coolant system process control system Production Control System Program Costing Staff Punched Card System Partitioning Communication System