SPI

SPI may stand for:

In organizations:

Shotmed Paper Industries, an Egyptian paper manufacturer
Simulations Publications, Inc., an American publisher of board wargames
Sony Pictures Imageworks, a visual effects and animation company
SPi Technologies, a business outsourcing provider founded in the Philippines
Stream Processors, Inc. Stream Processors, Inc. a fabless semiconductor company making parallel processors for embedded markets.
Sisters of Perpetual Indulgence, international LGBT non-profit group
Society for Philosophical Inquiry, a non-profit organization promoting discussion of philosophy
Society of the Plastics Industry, a U.S. trade association
Software in the Public Interest, a non-profit organization promoting free and open-source software
Software Patent Institute, an American non-profit assisting in the correct assignment of software patents
St. Pascual Institution, former name of Colegio de San Pascual Baylon, a school in Obando, Bulacan, Philippines
St. Paul's Institution, Seremban, secondary school in Malaysia
Sveriges Pensionärers Intresseparti, or Swedish Senior Citizen Interest Party, a political party in Sweden

In finance:

SPI 200 futures contract, the benchmark equity index futures contract in Australia
Swiss Performance Index, most closely followed stock index in Switzerland

In technology:

SCSI Parallel Interface, in physical data transfer, a parallel electrical bus interface
Serial Peripheral Interface Bus, a synchronous serial data link standard that operates in full duplex mode
Security Parameter Index, in computer networking, an identification tag added to the header
Service provider interface, a software mechanism to support replaceable components
Software Process Improvement, an initiative of the Data & Analysis Center for Software
Stateful packet inspection, the process used by a firewall to keep track of the state of network connections
System Packet Interface, family of interfaces from the Optical Internetworking Forum
SPI-3, a system packet interface designed to be used in systems that support OC-48 SONET interfaces
SPI-4.2, a system packet interface designed to be used in systems that support OC-192 SONET interfaces
SharePoint Project Item, a collection of project files in Microsoft SharePoint.

In other: