SAC Space Application Centre
SAARC South Asian Association for Regional Co-operation
SAFTA South Asian Free Trade Area
SAI Sports Authority of India
SAIL Steel Authority of India Limited
SAPTA SAARC Preferential Trading Agreement
SARS Severe Acute Respiratory Syndrome
SATNAV Satellite Navigation (Initiative)
SAVE SAARC Audio Visual Exchange
SC Security Council; Supreme Court; Scheduled Caste
SCI Shipping Corporation of India
SCO Shanghai Cooperation Organisation
SCOPE Standing Conference on Public Enterprises
SCRA Special Class Railway Apprentice
SDO Sub-Divisional Officer
SDR Special Drawing Rights (created by the World Bank)
SEBI Securities and Exchange Board of India
SFC Strategic Forces Command
SGPC Shiromani Gurdwara Prabandhak Committee
SHAR Shri Harikota Range
SIDBI Small Industries Development Bank of India
SIS Secret Intelligence Service (U.K)
SIT Special Investigation Team
SITA Suppression of .Immoral Traffic in Women and Girls Act
SITE Satellite Instructional Television Experiment
SLV Satellite Launch Vehicle
SLR Statutory Liquidity Ratio
SMS Short Messaging Service; Subscriber Management System
SOS Save Our Souls—distress signal
SPCA Society for the Prevention of Cruelty of Animals
SPG Special Protection Group
SPICMC Society for the Promotion of Indian Classical music and culture
SPIN Software Process Improvement Networks
SPV Solar Photo Voltaic
SQUID Super-conducting Quantum Interference Device
SRE Space Capsule Recovery Experiment
SRV Submarine Rescue Vessel
SSN Social Security Number
STARS Satellite Tracking and Ranging Station
START Strategic Arms Reduction Talks
STEP Science and Technology Entrepreneurship Park
STD Subscribers Trunk Dialing
STPI Software Technology Parks of India
STT Securities Transaction Tax
SWAN State-wide Area Network
SWAPO South West African People's Organisation
SWIFT Society for Worldwide Financial Telecommunications