SPI may refer to:

Businesses

  • Simulations Publications, Inc., a former US board game publisher
  • Sony Pictures Imageworks, a subsidiary of Sony specializing in computer animation
  • Stream Processors, Inc, a semiconductor company

Organizations

  • Indian Protection Service, a former Brazilian agency whose Portuguese name (Brazil's native language) is Serviço de Proteção ao Índio
  • Sisters of Perpetual Indulgence, an LGBT activism movement
  • Society for Philosophical Inquiry, a non-profit organization devoted to propagating a version of Socratic inquiry
  • Society of the Plastics Industry, a U.S. trade association
  • Software in the Public Interest, an American non-profit organization dedicated to the creation and distribution of free open-source software
  • Software Patent Institute, an American non-profit organization assisting in obtaining software patents
  • St. Pascual Institution, Philippines school
  • St. Paul's Institution, a school in Malaysia
  • Sustainable Preservation Initiative, of cultural heritage
  • Sveriges Pensionärers Intresseparti, or Swedish Senior Citizen Interest Party
  • Social Progress Imperative, a US-based nonprofit created in 2012

Computing

  • SCSI Parallel Interface, a suite of standards for inter-connecting electronic devices
  • Serial Peripheral Interface, the de facto standard for serial communication
  • Security Parameter Index in IPSec tunneling
  • Server Programming Interface, an API for PostgreSQL to run SQL queries from the C programming language
  • Service provider interface, an API for Java
  • Software Process Improvement, an approach to software development initiated by the Data & Analysis Center for Software
  • System Packet Interface for networking
  • Stateful Packet Inspection for networking

Other uses

  • Schedule Performance Index, a figure of merit used in earned value management
  • Single-point injection, an obsolete method of injecting fuel into an internal combustion engine
  • Social Progress Index of countries
  • Abraham Lincoln Capital Airport (IATA code), US
  • Sediment Profile Imagery, a technique for underwater photography of the interface between the seabed and the overlying water
  • South Padre Island, a resort town in Cameron County, Texas
  • Spi-calculus (Synchronous -calculus), a proposed extension of -calculus
  • Superintendent of Public Instruction, a state-level official in the United States who is responsible for public education (all states have such an official, but some states have a slightly different title for the position)
  • Swiss Performance Index, one of the indecies used to measure the performance of the SIX Swiss Exchange

See also

  • SPI 200 futures contract, Australian index
  • Spy (disambiguation)