Acronyms & Abbreviations

The definition of ISS is:

I am so sure

I said so

I'm So Sure

Ideal Solidus Structures

Identification Services Subcommittee

Idiopathic short stature

Idle Speed Stepper

Image Sharpness Scale

Image Stabilization System

Imaging Science Subsystem

Imaging Science System

Immunostimulatory DNA sequence

Immunostimulatory DNA sequences

Immunostimulatory sequence

Immunostimulatory sequences

Immunosuppressive substance

Impairment level sumscore

Imprinted Sportswear Show

Impulsive Stimulated Scattering

In School Suspension

In Service Support

In-situ Sampling

Inbred Short-Sleep

Incapacity Status Scale

Inchape Shipping Services

Increased serum survival

Independent Satellite Symposia

Index of Specifications and Standards

Indian Springs School

Indian Staging Section

Indiana Secretary of State

Individual Support Services

Industrial Safety Solutions

Industrial Secondment Scheme

Industry Standard Server

Industry Standard Servers

Inertial Sensor System

Inertial Subsystem

Infantile spasms

Inferior sagittal sinus

Information and Scientific Systems

Information Security Services

Information Security Solutions

Information Security Specialist

Information Security System

Information Sending Station

Information Services Seminar

Information Services Standard

Information Services Supermarket

Information Sharing System

Information Storage System

Information Storage Systems

Information Stores

Information Subsystem

Information Support Services

Information System Security

Information Systems

Information Systems and Sciences

Information Systems Security

Information Systems Services

Information Systems Specialists

Information Systems Support

Information Sysytems Staff

Infrastructure Security Strategy

Inherent Shutdown System

Initial send sequence

Initial Send Sequence Number

Initial Sortie Study

Injury Severity Scale

Injury severity score

Injury Severity Scores

Inlet switching station

Inorganic suspended solids

Input Shaft Speed

Input Speed Sensor

Input Status Scan

Input SubSystem

Insertion sequences

Inspection Selection System

Installation Support Services

Institut für Sicherheitsstudien

Institute for Space Studies

Institute for Standardization of Serbia

Institute for Strategic Studies

Institute of Safety and Security

Institute of Social Studies

Institute of Sustainability Science

Institute of Systems Science

Institutional Shareholder Services

Instruction Set Simulator

Instruction Summary Sheet

Instructional support services

Instructional Support System

Instructional Systems Specialist

Instructional Systems Support

Instrument Society of Sweden

Instrument Support Structure

Integrated Satellite Solutions Corporation

Integrated Scheduling Specialist

Integrated Scheduling System

Integrated Science Systems

Integrated Sealift Study

Integrated security system

Integrated Sensor Suite

Integrated Sensor System

Integrated Signaling System

Integrated Signalling System

Integrated Software Systems

Integrated Sounding System

Integrated Sounding Systems

Integrated Space Systems

Integrated Start System

Integrated Storage System

Integrated Study Site

Integrated Summary of Safety

Integrated Support Solutions

Integrated Support Stand

Integrated Support Systems

Integrated Surveillance System

Integrated Surveillance Systems

Integrated Switching System

Integrated System Schematic

Integrated System Services

Integrated System Support

Integrated Systems Sector

Integrated Systems Specification

Integrated Systems Support

INTEGRATION SPACECRAFT SYSTEM

Integration Support Services

Intelligence Specialists

Intelligence Support Staff

Intelligence Support Subsystem

Intelligence Support System

Intelligence Systems and Services

Intelligence Systems Secretariat

Intelligent Services Switch

Intelligent Software Solutions

Intelligent Support System

Intelligent Support Systems

Inter-Satellite Service

Interactive Selling Solutions

Interactive Survivability Simulation

Interagency Sedimentation Subcommittee

Interconnect Systems Solution

Interfacial Shear Stress

Interictal spikes

Interim Status Standards

Interim Supply Support

Interim System Support

Interlaminar Shear Strength

Interline settlement system

Intermediate Service School

Intermediate Service Schools

Intermediate solid solution

Internal Secondary Storage

Internal Secondary Structure

Internal Security Section

Internal State Scale

Internal Sublayer Service

Internation Symbology Specification

International Schools Services

International Seaweed Symposium

International Seismological Summary

International Skeletal Society

International Small Switch

International Social Service

International Society for Stereology

International Society of Surgery

International Space Station

International Space Station's

International Space System

International Staging System

International Steamboat Society

International Student Servcies

International Student Service

International Student Services

International Students Service

International Summer School

International Switching Symposium

International Symbology Specification

International Symposium on Superconductivity

Internet Scanner Systems

Internet Security Scanner

Internet Security Services

Internet Security Suite

Internet Security Systems

Internet Sharing Software

Interrupt Safety System

Interrupt Service Subroutines

Interruptible Sales Service

Interservice Supply Source

Interservice Supply Support

Invasive surgical staging

Invensys Software and Systems

Involuntary Servitude and Slavery

Ion scattering spectroscopy

Ion Surface Scattering

Ion-Scattering Spectrometer

Ion-Scattering Spectrometry

Ion-Scattering Spectroscopy

Ion-Scattering Spectrum

Ionica Switch Site

Ionosphere Sounding Satellite

Ionospheric Sounding Satellite

Iredell-Statesville Schools

IRIS Spinning Stage

Iron & Steel Society

Iron and Steel Society

ISLANDS

Isotonic saline solution

Isotope separation system

Issue

Istituto Sperimentale per la Selvicoltura

Italian Space Society

Meridiana