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GLOSSARY / ACRONYMS

• AA - Accelerometer Assembly
• DPS - Data Processing System
• ECL - Environmental cooling loops
• EPD - Electrical power distribution
• GPC - General purpose computer
• GSE - Ground support equipment
• IMU - Inertial measuring unit
• INS - Instrumentation systems
• LDB - Launch data bus
• LPS - Launch processing system
• LRU - Line replaceable unit
• MDM - Multiplexer Demultiplexer
• MPS - Main propulsion system
• NWS - Nosewheel steering system
• OPF - Orbiter processing facility
• PCMMU - Pulse coded modulation master unit
• R&R - Remove and replace
• RCS - Reaction control system
• RMS - Remote manipulator system
• SSME - Space shuttle main engine
• TFL - Telemetry format load
• TVC - Thrust vector control

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Edgar Zapata, NASA Kennedy Space Center

Shuttle Process Engineering Directorate, Fluid Systems Division