Positive Temperature Coefficient 
Passive Thermal Control 
Precision Technologies and Components 
Platform Technology Committee 
Parallel Test Component 
Power Train Components 
Pacific Telecommunications Council 
Payload Test Conductor 
Payload Training Capability 
Pending Trouble Code 
Personal Transfer Capsule 
phase-transfer catalysis 
Programmed Transmission Control 
Pacific Telecommunications Conference 
papillary thyroid carcinoma 
Parametric Technology Corporation 
Payload Training Complex 
peace through confrontation 
percutaneous transhepatic cholangiogra… 
Performance Technology Center 
Personal Telecommunications Center 
Personnel Transfer Capsule 
phase transition curve 
Philmont Training Center 
Pitch Trim Compensator 
plasma thromboplastin component 
Police Training Centre 
Portable Teletransaction Computers 
Portable Temperature Controller 
Positive-Temperature-Coefficient