What does SIS stand for?

Canadian Security and Intelligence Service - UTLAS symbol

Naval Intelligence Service - Italy

Paine Webber Gp Stk Index Sec - AMEX symbol

Paine Webber Group - AMEX symbol (SAG)

Safety Information System - Department of Transportation

Safety Injection Signal - Nuclear energy (IAA)

Safety Injection Symbol (SAUS)

Safety Injection System - Nuclear energy (NRCH)

Safety Instrumented System (ACII)

Safety Interlock Switch - Automotive electronics

Safety Interlock System (SAUS)

SAGE - Semiautomatic Ground Environment Interceptor Simulator

SAIL - Shuttle Avionics Integration Laboratory Interface System - NASA (NASA)

Saline Infusion Sonohysterography - Gynecological procedure

SAlL Interface System (SAUS)

Sample Inlet System - Automotive exhaust emission testing

Satellite Information Service (SAUS)

Satellite Infrared Spectrometer - NASA

Satellite Inspector System (SAUS)

Satellite Interceptor System - Military (AFM)

Savage Information Services (IID)

Scale for the Identification of School Phobia - Test

Scanning Image Spectrometer

Scanning Imaging Spectrometer

Scanning Imaging Spectrophotometer (SAUS)

Scanning Imaging Spectroradiometer (SAUS)

Scheduling Information System (SAUS)

Schengen Information System (SAUS)

School Internet Server

School of Information Studies (SAUS)

Science Information Service (EA)

Science Information Services - Franklin Institute

Science Integration Staff (SAUS)

Scientific Information System (ELAL)

Scientific Instruction Set

Scientific Instrument Services (SAUS)

Scientific Instrument Society (EA)

Scotch-Irish Society of the United States of America (EA)

Screening/Inspection System (DNAB)

Seaborne Instrumentation System (SAUS)

Secondary Injection System

Secretarial Information System (EPA)

Secret Intelligence Service - British

Secret Service Intelligent (SAUS)

Security and Investigations Service (SAUS)

Security Information Service (SAUS)

Security Intelligence Service - New Zealand (WDAA)

Selected Inventor Service (NITA)

Selected Ion Storage - For spectometry

Selective Inquiry System (SAUS)

Semiautomatic Imagery Screening Subsystem (MCD)

Semiconductor Insulator Semiconductor (SAUS)

Semiconductor-Insulator-Semiconductor

Seminar Information Service (IID)

Seminar Information Service Database - Seminar Information Service, Inc. - Information service or system (CRD)

Senior Intelligence Service - CIA personnel

Sensor Image Simulator (MCD)

Sensor Integration System (DWSG)

Sensory-Information Store (DIPS)

Serial Input System (MCD)

Serotonin Irritation Syndrome - Medicine (EDAA)

Service Improvement Section (SAUS)

Serving the Indigent Sick

Set of Identifying Sequences (SAUS)

Settlement Information Strategy - Australia

Seychelles International Safari Air Ltd. - ICAO designator (FAAC)

Shaken Impact Syndrome (MELL)

Shaken Infant Syndrome

Shared Information Service (CMD)

Shared Information System (SAUS)

Share Information Service - British (DCTA)

Share in Savings

Shipping Instruction Sheet

Shock Insulation (or Isolation) Support (SAUS)

Shock-Isolation Support

Shock-Isolation System

Shorter Interval Scheduling - Quality control (IAA)

Short Internal Scheduling

Short Interval Scheduling - Quality control

Shut-In Society

Shuttle Imaging Spectrometer (SAUS)

Shuttle Information System - NASA (MCD)

Shuttle Interface Simulator - NASA (NASA)

Sicherheits-Service fur Informations-Systeme (EFIS)

Side Impact Sensor - Automotive engineering

Signaling Interworking Subsystem - Telecommunications (TEL)

Signal in Space - Communications

Signal Intelligence Service - Later, Army Security Agency

Signalling Interworking Subsystem (SAUS)

Significant Indications Summary

Silicon Integrated Systems (SAUS)

Silicon of Insulating Substrate (MCD)

Silicon of Insulating Substratum

Silkridge Resources - Vancouver Stock Exchange symbol

Siltstone (SAUS)

Silver Shadow - NCIC car model code

Silviculture Information System (ALAC)

Simian Sarcoma Virus - Oncology

Simulation Interface Subsystem (KSC)

Simulation Interface System (SAUS)

Simulator-Induced Syndrome - Medicine (EDAA)

Simulator Interface System

Single Image Software (SAUS)

Single Image System (SAUS)

Single Item Squawk

Single Item Squawk Sheet

Singles in Service (EA)

Sion - Switzerland - Seismograph station code, US Geological Survey - Closed (SEIS)

Sishen - South Africa - Airport symbol (OAG)

Sisomicin (STED)

Sister

Siuslaw - Language code (ETLW)

Sivispacem - NCIC firearms make code (NCIC)

Social Information System - Medicine (DMAA)

Social Insurance Substitute (SAUS)

Societa Internazionale Scotista - International Scotist Society - ISS (EAIO)

Society for Iranian Studies (EA)

Society for Italian Studies (AIE)

Society of International Secretaries

Software Implementation Specifications - NASA (NASA)

Software Information Services (SAUS)

Software Integrated Schedule - NASA (NASA)

Software Intensive System

Solar Irradiance Spectrometer (SAUS)

Solid-State Imaging Spectrometer

Somatic Inkblot Series - Personality development test - Psychology

Sound in Sync (IAA)

Soviet Intelligence Services

Space and Information System

SPALT - Special Projects Alterations Information Shut

SPALT - Special Projects Alterations Information System

Spark Ignition System

Spatial Information System (SAUS)

Spatial Information Systems - Computer Aided Development Corporation (GIS)

Speaker Intercom System (KSC)

Special Industrial Services - United Nations Industrial Development Organization

Special Information System (MCD)

Special Intelligence Service

Special Interest Section (SAUS)

Special Interest Sessions

Special Interest Subgroup (SAUS)

Special Isotope Separation - Physics

Special Isotope Separator (COE)

Specialized Industrial Suppliers (SAUS)

Specialized Information Services (SAUS)

Specification Information System

Spectral Imaging Sensor

Spectral Index of Sample - Experimentation

Spontaneous Interictal Spike - Medicine (DMAA)

Spuria Iris Society (EA)

Stage Interface Simulator (IAA)

Stage Interface Substitute

Stall Inhibitor System - Aviation (GFGA)

Stand-Alone Information System - National Library of Medicine

Standard Indexing System - DoD

Standard Information System (SAUS)

Standard Instruction Set (MSA)

Standard Interface Specification - NASA (GFGA)

Standardiseringskommissionen i Sverige - Open Systems Interconnection - Sweden (ODAA)

Standards Information Service - National Institute of Standards and Technology (IID)

Standards Information System (SAUS)

State Information Service - Australia

State Institute of Statistics (SAUS)

Station Identification Store - Bell Laboratories

Statistical Information System (SAUS)

Stator Interstage Seal

Stay in School (SAUS)

STEP - Scientific and Technical Exploitation Program Information Subsystem

Sterile Injectable Solution (STED)

Sterile Injectable Suspension

Stockholm Information Service (SAUS)

Stored Information System (IAA)

STOW - Synthetic Theater of War Infrastructure System - Military technology (DDF)

Strategic Information System (SAUS)

Strategic Intelligence School - Military

Strategic Intelligence Summary - Military (NATG)

Strategic Intelligence Systems, Inc. - Also, an information service or system (IID)

Strategic Interplanetary System (SAUS)

Streamlined Inspection System - USDA meat standards

Structured Information Store - Open Systems Interconnection (ODAA)

Structured Interview for Schizotypy (MELL)

Structure-Related Internal Stress (SAUS)

Student Information System (SAUS)

Student Instruction Sheet - Military

Student International Service - Foundation

Styrene Isoprene Styrene (SAUS)

Styrene-Isoprene-Styrene - Organic chemistry

Submarine Integrated SONAR

Submarine Integrated System (SAUS)

Subscriber Identity Security (SAUS)

Successor Instruction Set (IAA)

Suomen Itamainen Seura - Helsinki University (APS)

Superconducting-Insulating Superconducting (SAUS)

Superconductivity Information System - Department of Energy - Information service or system (IID)

Superconductor-Insulator-Superconductor - Transistor technology

Super Instrumentation System (SAUS)

Supervisory Inventory on Safety - Test

Supplier Identification System - London Enterprise Agency - Information service or system (IID)

Supplies Information System (NITA)

Supply Item Status

Support Information System (SAUS)

Surface Indicator Scale (SAUS)

Surgical Infection Society (EA)

Sveriges Standardiseringskommission - Swedish Standards Institution - Also, an information service or system (IID)

Swedish Information Service (SAUS)

Swedish Inteplanetary Society (IAA)

Swedish Standards Institute (CENE)

Swedish Standards Institution (IID)

Synchronous Identification System (MCD)

Synopsis Information System (AAGC)

Synthetic Jobstream - Computer science (HODG)

System Installation Suite - Set of tools

System Integration Schedule - NASA (NASA)

System Integration Support

System Interface Specification (SAUS)

System Interrupt Supervisor

Scanning Imaging Spectrometer (NAKS)

Serial Input Special (NAKS)

Shuttle Information System - NASA (NAKS)

Shuttle Interface Simulator - NASA (NAKS)

Sister (GEAB)

Software Implementation Specification (NAKS)

Software Integrated Schedule (NAKS)

Standard Interface Specification (NAKS)

Systems Integration Schedule (NAKS)