Instrument Pointing System 
Intrusion Prevention System 
inches per second 
Integrated Program Summary 
Intelligent Peripherals 
Imaging Proton Sensor 
Integrated Power System 
Internet Protocol Suite 
Inter Press Service 
Information Processing System 
Instrument Pointing Subsystem 
Integrated Planning System 
Intelligent Protection Switching 
Illustrative Planning Scenario 
Indian Police Service 
Integrated Propulsion System 
INTERNATIONAL PARTS SERVICE 
International Pipe Standard 
Illustrative Planning Scenarios 
Inch Per Second 
Inflation-Protected Security 
Information Processing Standards 
In-Plane Switching 
Institute of Purchasing and Supply 
Instructions Per Second 
Instrumentation Power Subsystem 
intelligence production section 
Interface Problem Sheets 
Interruptions Per Second 
Inverter Power Supply