What does Is stand for?

Insertion (QSUL)

Isaiah - Old Testament book

Isidore - Authority cited in pre-1607 legal work (DSA)

Isis - A publication (SAUS)

Islam (BJA)

Islamic (SAUS)

Islands - Maps and charts

Israel - IYRU nationality code (BJA)

Installation Support - Aerospace (NAKS)

Island (STED)

Islet (STED)

Isolation (STED)

Israel - MARC country of publication code - Library of Congress (LCCP)

Air Survey Co. of India Ltd. (SAUO)

Defense Industrial Supply Center (SAUO)

Eagle Air - ICAO designator (AD)

Ibbi-Sin (BJA)

Iceland - ANSI two-letter standard code (CNC)

Ice Screamers (EA)

Ichthyosis Simplex - Medicine (MELL)

Ideological Survey - Psychology

IDS Aircraft Ltd. - British - ICAO designator (ICDA)

If Statement (SAUS)

Ignition and Separation (IAA)

Image Stabilization - Technology from Canon

Image Stabilizer - Canon's technology for binoculars

Image Subtraction (SAUS)

Imaging Spectrometer (SSD)

Immediate Sensitivity - Medicine (DB)

Immediate Support (SAUS)

Immittance Spectroscopy (EDCT)

Immortalist Society (EA)

Immortal Syndicate

Immune Serum - Also, ImS

Immunological Similarity

Immunology Status - Medicine (DB)

Immunosuppressive - Immunochemistry

Impact Strength (SAUS)

Impact Switch (SAA)

Imperative Sentence (SAUS)

Imperative Statement (SAUS)

Improved Suspension (MCD)

Incentive Spirometer - or Spirometry - Medicine (DMAA)

Include Statement (SAUS)

Including Sheeting

Incoherent Scatter

Income Statement - Business term

Incomplete Sequence (MSA)

Independent School (BARN)

Independent Sector (EA)

Independent Seminar (SAUS)

Independent Shoemen of America - Defunct (EA)

Independent Spherical Aluminum Tank - on a ship (DS)

Independent Study (SAUS)

Independent Suspension

Indexed Sequential - Computer science

Indexing in Source

Index of Sexuality (SAUS)

Index Sequential (SAUS)

Indian Show

Indian Standard (IAA)

Indian Summer (SAUS)

India Society (SAUO)

Indicating Switch (NRCH)

Indicator Score (SAUS)

Induced Sputum - Otorhinolaryngology (DAVI)

Induction Soldering

Industrial Safety (SAUS)

Industrial School - British (ROG)

Industrial Service - Equipment specifications

Industrial Society (AIE)

Industrial Source (GNE)

Industrial Specialist

Industrial Systems (DS)

Industry Standard (BCP)

Inertial Systems (AFIT)

- The Infantry School - Army (MCD)

Infant Size (DB)

Infection Structure - Plant pathology

Infectious Spondylitis - Medicine (MELL)

Information Science (IEEE)

Information Seekers

Information Selection (SAUS)

Information Separation (NITA)

Information Separator - Control character - Computer science

Information Series (SAUS)

Information Service

Information Services - Portion of InterNIC General Atomics Corporation

Information Signal (SAUS)

Information Source (SAUS)

Information Storage (SAUS)

Information Stream (SAUS)

Information Supply (SAUS)

Information System

Information Systems - Ori, Inc. - Information service or system (IID)

Infrared Spectrometer - or Spectroscopy (IAA)

Infrared Spectroscopy (SAUS)

Ingglish Speling 3soesiaesh3n - An organization to reform spelling - See also IS3 (EA)

Ingot Sheet (SAUS)

Inguinal Syndrome - Medicine (MELL)

Inhibiting Signal (SAUS)

Initializing Sequence (SAUS)

Initial Shortage (AFM)

Initial State (SAUS)

Initiate Statement (SAUS)

Initiation Supervisor

Inner Sheath - Botany

Inorganic Semiconductor - Materials science

Input Secondary - Electronics

Input Section (SAUS)

Input Signal (ACAE)

Input Simulator

Input Source (SAUS)

Input Stream (SAUS)

Input System (SAUS)

In Secondary (SAUS)

Insect Screen (AAG)

Insenion Sequences (SAUS)

Insertion Sequence - Genetics

In Service - Telecommunications (TEL)

In Shop (MCD)

Inside Sentinel - Freemasonry

In Situ - In Place - Latin

Insoluble (SAUS)

Inspection Services, Inc. (EA)

Installation of Systems (IAA)

Installation Squadron (SAUO)

Installation Start - Telecommunications (TEL)

Installation Support (KSC)

Institute of Science (SAUS)

Institute of Statisticians - British

Institute Sponsors (SAUO)

Instructional System (SAUS)

Instruction Section - Association of College and Research Libraries - American Library Association

Instruction Sequence (SAUS)

Instruction Set (SAUS)

Instruction Sheet

Instructions to Ship (AAG)

Instruction System (SAUS)

Instructor Squadron

Instructor Station - Training term (LPT)

Instrument (IAA)

Instrumentation Ships Project - Navy

Instrumentation Summary (MUGU)

Instrumentation System (KSC)

Insufficiently Stamped - Post office - British (ROG)

Insufficient Signal (PALA)

Insulated System (SAUS)

Insulating Sleeve

Insurance Salesman - A publication (SAUS)

Integrally Stiffened

Integrated Satellite - Military spacecraft

Integrated Service (SAUO)

Integrated Systems (SAUS)

Integrating Sphere - An optical component

Integrating Support

Integration Software (SAUS)

Intelligence in the Sky - An extraterrestrial intelligence with whom Dr. Andrija Puharich and psychic Uri Geller claim to have communicated

Intelligence Service (IAA)

Intelligence Signal (SAUS)

Intelligence Specialist - Navy

Intelligence Support - Program - Department of State

Intelligence System (SAUO)

Intelligence Systems - Military (MCD)

Intensity Stereo (SAUS)

Intent Share (SAUS)

Interactional Sociolinguistics - Linguistics (IEL)

Interactive Service (SAUO)

Interblock Space (SAUS)

Intercellular Space (DB)

Interchangeability and Substitution

Intercoastal Space (SAUS)

Interconnecting Station (MCD)

Intercostal Space - Medicine

Interdepartmental Settlement (FOTI)

Interface Specifications (AAEL)

Interface Structure (ACAE)

Interface Summary (SAUS)

Interference Spectroscope (SAUS)

Interference Suppression (SAUS)

Interference Suppressor (IEEE)

Interim Services - NYSE symbol

Interim Status (GNE)

Interim Storage (SAUS)

Interim Study (SAUS)

Interior Surface

Intermediate School

Intermediate Suppression (MCD)

Intermediate System - Computer science (TNIG)

Internal Security - Military - British

Internal Shield - Electronics

Internal Standard - Chemistry

Internal Standards (SAUO)

Internal Surface (AAG)

Internationaler Suchdienst - International Tracing Service (EAIO)

Internationale Schutzenunion - International Shooting Union (EAIO)

International Sales (SAUO)

International Services - Red Cross

International Socialist - A publication (SAUS)

International Socialists

International Society of Sculptors, Painters, and Gravers

International Staff (NATG)

International Standard

International Status (SAUS)

International Stock - Business term

International Studies - A publication (SAUS)

International Supplement (SAUO)

International Symposium (SAUS)

Internet Standard - Communications term (DCT)

Interpretive Services (ALAC)

Interrupt Set (SAUS)

Interrupt Signal (SAUS)

Interrupt State (SAUS)

Interrupt Status (SAUO)

Intersegmental

Interservice

Intership - Freight forwarding company - British

Interspace

Interstage Section (SAUS)

Interstage Shielding (SAUS)

Interstate

Interstate/Johnson Lane - Formerly, Interstate Securities, Inc. - NYSE symbol (SPSG)

Interstate Securities, Inc. (SAUO)

Interval Signal

Intestinal Stenosis - Medicine (MELL)

Intracardial Shunt - Medicine (DB)

Intraspinal - Injection

Intrasplenic (DB)

Intrastriatal (DB)

Intraventricular Septum - Cardiology (AAMN)

Intrinsic Safety (SAUS)

Invalided from Service - Medicine - Navy

Invalid Semantics (SAUS)

Inventory Schedule

Inventory Store (SAUS)

Inventory System (SAUS)

Inverted Stepanov (SAUS)

Investment-Savings - Economics

Investors Group (SAUO)

Ion Source - Spectroscopy

Ion Spectroscopy (SAUS)

Ion Spectrum (SAUS)

Iowa State University of Sciences and Technology (SAUS)

Irish Society

Irish Standard (IAA)

Irish Statesman - A publication (SAUS)

Irrational Screening (SAUS)

Island (DA)

Isle (EY)

Isolated Step

Isolation

Isomeric Shift (OA)

Isomer Shut (SAUS)

Isometric Strength - Medicine (MELL)

Isotonic Strength - Medicine (MELL)

Isotopic Separation - Subsystem (MCD)

Israel - GeoNet country code (GEON)

Israel - NCIC firearms make code (NCIC)

Israel - NCIC country-territory code (NCIC)

Israel - Federal Information Processing Standard (FIPS) country code (GEON)

Israeli Shekel (SAUS)

ISSN - International Standard Serial Number - Online database field identifier

Issue Code - Online database field identifier

Issue Number - Dialog - Searchable field (NITA)

Istituto Superiore di Sanita - Italy - Research code symbol

Office of Intelligence and National Security (SAUS)

Terminal in Service (SAUO)