Acronyms & Abbreviations

The definition of SPI is:

IATA code for Abraham Lincoln Capital Airport, Springfield, Illinois, United States

Safety Performance Indicator

Salmonella pathogenicity island

Scalable Parallel Instrumentation

Schedule Peformance Index

Schedule Performance Index

Schedule Performance Indicator

Scheduled Performance Index

Science Program Implementation

Science Publishers Inc.

SCOTTISH POWER PLC

Scottish Power pls

SCSI Parallel Interface

SCSI-3 Parallel Interface

SDH Physical Interface

Security Parameter Index

Security Parameter Indexes

Security Parameters Index

Security Patrol Instrumentation

Security Policy Initiative

Security profile inspection

Security Profile Inspector

Selective Population Inversion

Selective protein index

Self-Paced Instruction

Self-Perception Inventory

Sensitive Price Index

Sensitive Price Indicator

Serial Peripheral Interface

Serial to Parallel Interface

Serine protease inhibitor

Serine protease inhibitors

Serum protein index

Serum-precipitable iodine

Server Programming Interface

Service Profile Identification

Service Provider Identifier

Service Provider Indicator

Service Provider Interface

Service Provider Interfaces

Services Practice Instrumentation

Services Programming Interface

Shared Peripheral Interface

Ship-Port Interface

Shipley Personal Inventory

Sierra Pacific Innovations

Simulations Publications Inc.

Single Particle Impact

Single Platform Initiative

Single Point Injection

Single Process Initiative

Single Process Initiatives

Single Processor Interface

Single Program Indicator

Single-photon ionization

Single-point imaging

Sisters of Perpetual Indulgence

Site Population Index

Skim Perbankan Islam

Slagging pyrolysis incinerator

Smart Plant International

Smart Plug-In

Smart Procurement Initiative

Società Psicoanalitica Italiana

Society for the Plastics Industry

Society of Plastics Industries

Society of Professional Investigators

Society of the Plastics Industry

Socket Provider Interface

Soft phonation index

Software in the Public Interest

Software in the Public Interest, inc.

Software Patents Institute

Software Pirates Incorporated

Software Process Improvement

Software Products International

Software Protection Initiative

Source Packet Indicator

South Pacific Island Airways

Soy protein isolate

Soybean protein isolate

Space Power Incorporated

Space Power Institute

SPACE Provisioning Interface

Spacing Increment

Speaker Identification

Special Investigations

Special investigative

Special Package Instruction

Special Packaging Instruction

Special Packaging Instructions

Special Packing Instruction

Special Plot Identification

Special Position Identification

Special Process Indicator

Special Processing Indicator

Special Program Indicator

Specific Productivity Index

Spectrometer on Integral

Speech processor interface

Spending Potential Indexes

Spermiophagic index

Spiramycin

Spironolactone

Spitz

Spool

Spots Per Inch

Standard Picture Interconnect

Standard power interface

Standard practice instruction

Standard Practice Instructions

Standard Product Interface

Standard Programmatic Interface

Standardised Precipitation Index

Standardized Psychiatric Interview

Standardized-patient instructor

Standards for pediatric immunization

Stateful Packet Inspection

Station Program Identification

Strategic Planning and Information

Strategic Planning Initiative

Stream Programming Interface

Streaming Programming Interface

Strictly Private Information

Structured pain interview

Study of Perioperative Ischemia

Subclinical papillomavirus infection

Subnucleus interpolaris

Subsequent Protocol Identifier

Substance P immunoreactivity

Substance P-immunoreactive

Substance P-like immunoreactive

Substance P-like immunoreactivity

Such pathogenicity islands

Sun-Position Indicator

Superintendent of Public Instruction

Surface Penning Ionization

Surface Position Indicator

Sustainable Product Initiative

Svenska Petroleum Institutet

Swiss Performance Index

Sydney Pollution Index

Symbolic Pictorial Indicator

Symbolic Probabilistic Inference

Symptom problem index

Synchronous Peripheral Interface

Synchronous Physical Interface

Synchronous Pixel Interface

Synchronous Public Input

System Packet Interface

SYSTEM PERFORMANCE INSTRUMENT

System Peripheral Interface

SYSTEM PLANNING and INTEGRATION

System Programmer Interface

System Programmer's Interface

System Programming Interface

Systems Programmatic Interface

Systems Programming Interface

Systolic pressure index