Did you ever wonder what those strange conglomerations of letters meant? Here's your chance to find out what those NASA acronyms stand for. About Space and Astronomy presents the Guide to NASA Acronyms. From Interface Digital Processor to Integration Hardware and software Review - Integration to Interface Functional Analysis, you'll find them here.  This page lists acronyms starting with I. For others, click on the appropriate letter above or below.

[I]

I NTC/0: I NTC/0Integrated Checkout
I LAS: Instrument Landing Approach System
I LSP: Integrated Logistics Support Plan
I DAC: Integrated Digital-Analog Converter
I DAS: Integrated Data Acquisition System
I DPS: Interface Digital Processor
I ECM: Induced Environment Contamination Monitor
I ECO: Inboard Engine Cutoff
I LCCS: Integrated Launch Control and Checkout System
I D&CA: Inverter Distribution and Control Assembly
I F: Intermediate Frequency
I-load: Initial-load
IACS: Inertial Attitude Control System
IAD: Interface Agreement Document
IAD: Interface Analysis Document
IAL: Immediate Action Letter
IAL: International Algebraic Language
IARS: Independent Air Revitalization System
IAS: Indicated Airspeed
IAS: Integrated Avionics System
IAS: Impact Assessment Sheet
IASS: Inverter/ATCS Support Structure
IAT: Integrated Avionics Test
IAV: Inventory Adjustment Voucher
IB: Inert Building
IB: Inboard
IB: Instruction Book
IBF: Internally Blown Flap
IBM: International Business Machines
IC: Intercomputer communication
IC/ES: Intercommunication/Emergency Station
ICA: Item Change Analysis
ICAO: International Civil Aviation Organization
ICAO: International Civil Aviation Organization
ICAR: Investigation and Corrective Action Report
ICB: Interim Change Bulletin
ICB: Interrupt Control Block
ICC: Intercomputer Channel
ICC: Intercomputer Communication
ICC: Interface Control Chart
ICC: Interstate Commerce Commission
ICCB: Integrated Change Control Board
ICCP: Interface Coordination and Control Procedure
ICD: Interface Control Document
ICDR: Incremental Critical Design Review
ICDU: Inertial CouPling Data Unit
ICE: Input Control Element
ICF: interface Control Function
ICG: In-Flight Coverall Garment
ICH: Interchanger
ICMT: Intercontract Material Transfer
ICP: ICS Control Program
ICR: Instruction Change Request
ICT: Influence Coefficient Tests
ICTC: interface Control Tool ing
ICWG: Interface Control Working Group
ID: Identification
IDA: Interface Display Assembly
IDB: lnsuit Drink Bag
IDC: IMBLMS Digital Computer
IDC: Integrated Displays and Controls
IDC: Interface Document Control
IDCA: Inverter Distribution and Control Assembly
IDD: Interface Definition Document(s)
IDE: Initial Design Evaluation
IDG: Integrated Drive Generator
IDI: Instrumentation Data Items
IDMM: Intermediate and Depot Maintenance Manual
IDO: Interdivisional Operations
IDP: Integrated Data Processor
IDR: Intermediate Design Review
IDR: Interim Discrepancy Report
IDR: Initial Design Review
IDRD: Internal Data Requirement Description
IDRD: Information Definition Requirements Document
IDS: Interface Data Sheet
IDS: Item Description Sheet
IDSD: Institutional Data System Division (JSC)
IDSO: Interdivisional Sales Order
IDT: I-load Data Tape
IDTA: Interdivisional Technical Agreement
IDU: Interface Demonstration Unit
IDWA: Interdivisional Work Authorization
IE: Industrial Engineering
IEA: Integrated Electronic Assembly
IEA: Integrated electronic assembly
IECS: Igloo Environment Control Subsystem
IED: Interacting Equipment Documents
IEF: Isoelectric Focusing
IEP: Instantaneous Effective Photo Cathodes
IF: Integration Facility
IFA: In-Flight Analyses
IFASC: Integrated Functions Assessment Steering Committ
IFB: Invitation for Bid
IFM: In-Flight Maintenance
IFO: Information Systems Office
IFOT: In-Flight Operations and Training
IFR: Instrument Flight Rules
IFRU: In-Flight Replacement Unit
IFT: In-Flight Test
IFTM: In-Flight Test Maintenance
IFTS: In-Flight Test System
IFU: Interface Unit
IG: Igloo
IGA: Inner Gimbal Angle
IGAX: Inner Gimbal Axis
IGDS: Iodine Generating and Dispensing SYstem
IGM: Interactive Guidance Mode
IGN: "Ignition, Ignite"
IGOR: Intercept Ground OPtical Recorder
IGS: Inertial Guidance System
IGSE: In-Space Ground SUPPort Equipment
IGV: Inlet GUide Valve/Vanes
IH/SR: Integration Hardware and software Review
IHP: Indicated Horsepower
IHTV: Interim Hypersonics Test Vehicle
IHX: Interloop Heat Exchanger
IITCS: igloo Internal Thermal Control Section
ILA: Instrument Landing Approach
ILC: International Latex Corporation
ILC: Initial Launch Capability
ILLUM: Illuminate
ILP: Integrated Logistics Panel
ILS: Integrated Logistics System
ILS: Instrument Landing System
ILS: Integrated Logistics Support
ILS/LAR: Integrated Logistics System and Logistics Assess
ILS/LAR: Review
ILSSE: Integrated Life Science Shuttle Experiments
IMBLMS: Integrated Medical Behavioral Laboratory Measuremen
IMBLMS: System
IMCP: Integrated Monitor and Control Panel
IMD: Intermediate
IMDB: Integrated Maintenance Data Base
IMF: Inventory Master File
IML: Inside Mold Line
IMP: Initial Memory Protection
IMPD: Impedance
IMPLS: Impulse
IMU: Inertial measurement unit
IN: Information Systems Directorate (KSC)
IN: Inlet
INSTR: Instruct
INSTR: "Instrument, Instrumentation"
INSTRUM: Instrumentation Subsystem
INT: Internal
INT: Integrated Test
INT: Intensity
INTASAT: Instituto Nacional De Technica Aeroespacial Satell
INTCHC:iR: Interchanger
INTCHG: Interchange
INTCP: Intercept
INTEGR: "Integrate, Integration"
INTELSAT: International Telecommunications Satellite Organiz
INTEROG: Interrogate
INTF: Interface
INTG: Integration
INTLK: Interlock
INTR: Interior
INTRG: Interrogate
INTRLVR: Interleaver
INTRPT: Interrupt
INTV: Interim Hypersonics Test Article
INTVL: Interval
INTVLM: Intervalometer
INV: Inverter
INV MG: INV MGT Inventory Management
IOA: Input/Output or Assembly
IOA: input/Output Adapter
IOB: InPut/Output Box
IOB: InPut/Output Buffer
IOB: InPut/Output Buffer (if Bus
IOBPS: Input/Output Box and Peripheral Simulator
IOE: Input/Output Error Log Table
IOF: Initial Operational Flight
IOP: Input/output processor
IOPL: Integrated Open Problem List
IOQE: Input/Output C)ueue Element
IP: Inertial Processing
IP: InstruMentation PCM Data Bus
IP: Instrumentation Payload
IP: Identification of Position
IP: Intermediate Pressure
IP: Intermediate Pallet
IP: Igloo Pallet
IP: Instructor Pilot
IP: Impact Point
IP: Instrumentation/pulse code modulation master unit data bus
IPACS: Integrated Power and Attitude Control System
IPAD: Integrated Program for Aerospace Vehicle Design
IPB: Illustrated Parts Breakdown
IPB: Illuminated Push Button
IPC: Intermittent Positive Control
IPCL: Instrumentation Program and Component List
IPD: Information Processing Division
IPDR: Incremental Preliminary Design Review
IPE: Industrial Plant Equipment
IPF: IUS Processing Facility
IPL: Initial Program Load
IPL: Indentured Parts List
IPL: Initial program load
IPR: Interim Problem Report
IPS: ISA Interim Stowage Assembly
IPS: Interconnecting Station
IPS: is Installation Support
IPS: IRV Isotope Reentry Vehicle
IPS: IRU Inertial Reference Unit
IPS: ISD Instructional Systems DeveloPment (USAF)
IPS: isc Initial Software Configuration Map
IPS: IRIG Inertial Rate Integrating Gyro
IPS: Inside Radius
IPS: I RTCM Integrated Real-Time Contamination Monitor
IPS: Inner Roll Gimbal
IPS: Instrumentation Power Subsystem
IPS: IR SPECT Infrared Spectrometer
IPS: I RAN)
IPS: IRANSAT franian Government Communications Satellite (replace
IPS: IRR InsPection Rejection Report
IPS: IRAN Inspection and Repairs as Necessary
IPS: IPT In-Plant Transporter
IPS: IR Inclination of the Ascending Return
IPS: Initiating Reference Document
IPS: IPSL Interface Problem Status Log
IPS: IRL Initiating Reference Letter
IPS: Inverter Power Supply
IPS: IRIS Italian Research Interim Stage
IPS: ips International Pipe Standard
IPS: Interface Requirement List
IPS: Interface Problem Sheets
IPS: Interrange Instrumentation Group
IPS: IRD Information Requirements Document
IPS: lglc)O Passive Thermal Control Section
IPS: IRME Initiator Resistance Measuring Equipment
IPS: IRG Inertial Rate Gyro
IPS: Infrared
IPS: IRIG-B Interrange Instrumentation Group B
IPS: Inertial Reference Integrating Gyro
IPS: IRN Interface Revision Notice
IPS: IPTCS International Pipe Thread
IPS: Instrument Pointing System (Subsystem)
IPS: Integral Rocket Ramiet
IPS: International Rendezvous
IPS: IRAR Internal Variable
IPS: Inches per Second
ISIL: Interim Support Items List
ISL: Inertial Systems Laboratory
ISL/LAR: Integrated Logistics System and Logistics Assessment
ISL/LAR: Review
ISLM: Integration Shop/Lab Manager
ISOL: "isolate, Isolation"
ISP: Instrumentation Support Plan
ISP: Integrated Support Plan
ISP: Initial Specific Impulse
ISPG: Institutional Support Planning GrouP
ISPM: International Solar Polar Mission
ISR: Initial System Release
ISSL: Initial Spares Support List
ISTA: Intertank Structural Test Assembly
ISTB: Integrated Subsystem Test Bed
ISTF: Integrated System Test Flow
IT: Installation Test
IT: Identification Transponder
ITA: integrated Test Area
ITA: Integrated test article
ITAP: Integrated Technical Assessment Panel
ITC: igloo Thermal Control
ITE: integration Test Equipment
ITE: Intersite Transportation Equipment
ITE: Instrumentation Test Equipment
ITI: Inspection and Test Instruction
ITL: "Integrate, Transfer, and Launch"
ITMG: Integrated Thermal/Micrometeoroid Garment
ITO: Integration and Test Order
ITRDS: Integrated Test Requirements Documents
ITS: Instrumentation Telemetry Station
ITS: Interim Teleprinter System
IU: Interface unit
IUA: Interface Unit AdaPter
IUA: Inertial Unit Assembly
IUE: Interface Unit Error Count Table
IUS: Inertial upper stage
IVA: Intravehicular Activity
IVA: Intravehicular activity
IVAR: internal Variable
IVBC: "Integrated Vehicle Baseline Config,ration"
IVE: Interface Verification EquiPr-nent
IVL: lntervatometer
IVT: Intervehicular Transfer
IWBS: Indirect Work Breakdown Structure
IWG: Investigator Working Group
IWG: Interface Working Group
Identificat: Identification Data
Inertial Gu: Inertial Guidance
Inner Gimba: Inner Gimbal
Inner Glide: Inner Glideslope
Insertion B: "Insertion Burn, OMSI"
Inside Diam: Inside Diameter
Installatio: Installation Notice Card
Installatio: Installation Notification Certificate
Instrument: Group SuPport Equipment
Instrument: Ground
Instrument: Checkout Equipment
Instrumenta: Instrumentation and Communication
Instrumenta: Instrumentation Group
Interchange: Interchangeability and Replacement
Intercommun: Intercommunication SYstem
Intercommun: Intercommunications
Interface: Tool
Interface C: Interface Control Drawing
Interface C: Interface Control Specification
Interface C: Interface COmPatibility Record
Interface C: Interface Control Unit
Interface D: Interface Document
Interface F: Interface Functional Analysis
Interpretiv: Interpretive Co '
Inventory C: Inventory Control Point
Inverter As: Inverter Assembly
Issuing Age: Issuing Agency
Iterative G: Iterative Guidance Mode

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