APPENDIX 382 MCC-X SpaceX Mission Control Center MCS Motion Control System MDM Multiplexer/DeMultiplexer MER Mission Evaluation Room Metox metal oxide MHz megahertz MLI Multilayer Insulation MLM Multipurpose Laboratory Module MLS Mostly Liquid Separator MMC Mission Control Center mm Hg millimeters of mercury MMOD Micrometeoroid and Orbital Debris MPEV Manual Pressure Equalization Valve MPLM Multi-Purpose Logistics Module MRM Mini Research Module MSD Mass Storage Disk MSS Mobile Servicing System MT Moderate Temperature MTL Moderate Temperature Loop N1 Node 1 N2 nitrogen NBL Neutral Buoyancy Laboratory NCS Node Control System NTA Nitrogen Tank Assembly O2 oxygen O3 Orbit 3 OBSS Orbiter Boom Sensor System OCA Orbital Communications Adapter OCM Orbital Conjunction Message ODIN Onboard Data Interfaces and Network OGA Oxygen Generation Assembly OOS On-orbit Operations Summary OPS PLAN Operations Planner OPTIMIS Operations Planning TIMeline Integration System ORU Orbital Replacement Unit OSO Operations Support Office Operations Support Officer OSTP Onboard Short Term Plan OSTPV Onboard Short Term Plan Viewer PAS Payload Attachment System PBA Portable Breathing Apparatus Pc probability of collision PCA Pressure Control Assembly PCS Portable Computer System PDAM Predetermined Debris Avoidance Maneuver PDGF Power and Data Grapple Fixture PFCS Pump and Flow Control Subassembly PFE Portable Fire Extinguisher PHALCON Power, Heating, Articulation, Lighting Control PL Payload PLSS Primary Life Support System PLUTO Plug-in-Plan and Utilization Officer PMA Pressurized Mating Adapter PMCU Power Module Control Unit PMM Permanent Multipurpose Module POA Payload Orbital Replacement Unit Accommodations PPCR Planning Product Change Request PPL Pre-Positioned Load PPRA Positive Pressure Release Assembly ppm parts per million PPR Positive Pressure Relief PRO Power Resource Officer psi pounds per square inch PTCS Passive Thermal Control System PTR Port Thermal Radiator PV PhotoVoltaic PVCU PhotoVoltaic Control Unit PVM Photo-Voltaic Modules PVR PhotoVoltaic Radiator PVTCS PhotoVoltaic Thermal Control System PWD Potable Water Dispenser QD Quick Disconnect R&R remove and replace RAM Random Access Memory RAVEN Resource Avionics Engineer RBI Remote Bus Isolator RIO Remote Interface Officer RF radio frequency RFG Radio Frequency Group RGA Rate Gyro Assembly RM Redundancy Management ROBO Robotics Officer ROS Russian Orbital Segment Roscosmos Russian Federal Space Agency RPC Remote Power Controller RPCM Remote Power Control Module RPE Resource Planning Engineer