Acronyms & Abbreviations

The definition of SSI is:

Attack Submarine

IATA code for Malcolm McKinnon Airport, Brunswick, Georgia, United States

Safe-shutdown impoundment

Safety Significant Item

Safety, Security and Intelligence

Sales Support Information

San Salvador Island

Scalable Storage Interface

Scale for Suicidal Ideation

Scale for Suicide Ideation

Schedule Support Impact

Schuba Schools International

SCIENCE SUPPORT INTERFACE

Screening site investigation

Scuba Schools International

Seat Segment Information

Secret Special Intelligence

Sector Scan Indicator

Segmental sequential irradiation

Semi-structured interview

Sensitive Security Information

Sensitivity index

Sensor System Interface

Sequence Set Index

Serial Signal Interface

Serum Institut

Server Side Include

Server Side Includes

Server System Infrastructure

Server-Side Include

Server-Side Includes

Service Script Interpreter

Setchkin Self-Ignition

Severity score index

Shared Source Initiative

Ship System Integration

Ship's system instrumentation

Short Subscriber Identity

Shoulder sleeve insignia

Shoulder subluxation inhibition

Signal Strength Indicator

Significant Structural Item

Silicon Systems Inc.

Similar Source Integration

Simulated ischemia

Simultaneous Single-Issue

Single Sign-In

Single Signal Interconnect

Single System Image

Single-Source Image

Single-strand initiation

Single-System Image

Site of special interest

Site screening investigation

Site-selected Insertion

Size Selective Inlet

Skill Speciality Identifier

Sky Survey Instrument

Sliding Scale Insulin

Small Scale Integration

Small Serial Interface

Small-scale integrated

Small-Scale Integration

Social Security Income

Social Security increment

Social Security Insurance

Social Services Inspectorate

Software Standardization Initiative

Software Support Instruction

Software Systems Interface

Soil-structure interaction

Solar Spectral Irradiance

Soldier Support Institute

Soldier System Interface

Solid State Ignition

Solid State Imager

Solid State Imaging

Solid State Interlocking

Solid-State Imager

Solid-State Ionics

Somatic symptom index

Somatic Symptom Inventory

Sonic spray ionization

Sound Science Initiative

Southern Software Incorporated

Space Science Instrumentation

Space Segment Integration

Space Segment Integrator

Space Services Incorporated

Space Services, Inc.

Space Software Italia

Space Studies Institut

Space Studies Institute

Space System Integrator

Space Systems International

Spaceport Systems International

Special Scientific Interest

Special Secretariat for Informatics

Special Security Instruction

Special Skill Identifier

Special Skill Indicator

Special Skills Indicator

Specialist Schools Initiative

Specialty Skill Identifier

Specialty Skills Identifiers

Specialty Steel Industry

Spectral Signal Indicator

Spectral Solar Irradiance

Spectral Statistical Interpolation

SPECTRUM Solutions Integrator

Spin-Spin Interaction

Spinal instrumentation

Sporophytic self-incompatibility

Sporophytic SI

Stage Stores, Inc.

Stainless Steel Industry

Standing signal instruction

Standing Signals Instructions

Start Service Instruction

Start Signal Indicator

State Scholars Initiative

Statens Serum Institut

Statewide Systematic Initiative

Statewide systemic initiative

Static sciatic index

Steady-state irradiation

Stereo Surface Imager

Storage Server Interface

Storage-to-Storage Instruction

Strategic Simulation Initiative

Strategic Studies Institute

Strength strain index

Strength-strain index

Stress strain index

Structural Significant Item

Student Success Initiative

Stuttering severity instrument

Subject Says It

Submarine Systems Inc.

Subscriber Service Invocation

Substrate Subfloor Inspector

SubSystem Interface

Subtilisin inhibitor

Summer Science Institute

Sun Service Incorporated

SUNSTONE HOTEL INVESTORS, INC.

Supercomputer Systems, Inc.

Superintending Specialist Inspector

Supplement Security Income

Supplemental Security Income

Supplemental Security Income Program

Supplemental Security Insurance

Supplemental Staff Instruction

Supplementary Security Income

Supplementary Service Interactions

Supplementary System Information

Support System Interface

Surface Solutions Inc.

Surface Survey Information

Surface Systems Inc.

Surgical site infection

Surgical site infections

Suspect site inspection

Sustaining support increment

Svenska Silikatforskningsinstitut

Symptom severity

Symptom Severity Index

Symptoms index

Synchronica Serial Interface

Synchronous Serial Interface

Synchronous Service Window

Synchronous Systems Interface

Synergistic interaction

Synthase I

Synthetic Sentence Identification

System Security and Integrity

System Service Infrastructure

System Service Interface

System Services Interface

System Sign Inventory

System Software Interface

System Specific Interface

System Support Initiative

Vision Airlines