SSR

Businesses, entertainment and products

Solid State Records, a Christian record label
Chevrolet SSR, a Chevrolet small truck
Disney's Saratoga Springs Resort & Spa
Small Screen Rendering, a technology part of Opera Mini
Sonic and the Secret Rings, a 2007 platform video game
Stephen's Sausage Roll, a 2016 puzzle video game
Sirius Satellite Radio, a satellite radio service operating in North America
Strategic Scientific Reserve, a fictional organization in Marvel Comics and precursor to the fictional organization S.H.I.E.L.D.
SSR Wheels, a Japanese wheel manufacturer

Soviet Socialist Republic, see Republics of the Soviet Union
Slovak Soviet Republic (1919), a very short-lived communist state in south and eastern Slovakia
Slovak Socialist Republic, the official name of Slovakia from 1969 to 1990
Second Spanish Republic

Sabah State Railway, a railway in Malaysia
Southern Shorthaul Railroad, an Australian provider of motive power hauling trains in New South Wales and Victoria, and freight train operator
Southern Suburbs Railway, a New MetroRail project in Perth, Western Australia
Springfield Street Railway, a former interurban street railway in Springfield, Massachusetts
Strategic steam reserve, a collection of steam locomotives retained for use in a national emergency
Sub-surface Railways, cut-and-cover railway lines forming part of the London Underground; also called Sub-surface Lines

Scalable Sample Rate, used in MPEG-4 Part 3 and MPEG-2 Part 7
Scalable Source Routing, a routing algorithm for unstructured networks
Screen Space Reflections used in the computer graphics to compute approximate mirror reflections
Secondary surveillance radar, a radar system used in air traffic control
Simple Sequence Repeat, repeating sequences of 2-6 base pairs of DNA
Site-specific recombination, a type of genetic recombination in which DNA strand exchange takes place between segments possessing only a limited degree of sequence homology
Slope stability radar, the application for the monitoring of slope stability at open-cut mines
Solid-state relay, an electronic switching device in which a small control signal controls a larger load current or voltage
Sources, sinks and reservoirs, for greenhouse gases
Stable salt reactor, a proposed low-cost nuclear reactor design
Sum of squared residuals
Sum of squares due to regression
Server-side rendering, using a web server to deliver a customized HTML file for a user (client)
State-space representation, a particular type of a mathematical model of a physical system, used in control engineering and in satellite navigation

Swiss Broadcasting Corporation (SRG SSR)
Sainik School, Rewa, a senior secondary school in India
Security sector reform, a process to amend a security sector towards good governance
The South Saskatchewan Regiment, a Canadian infantry regiment
Special Support and Reconnaissance Company, a Danish military unit
The Structure of Scientific Revolutions, a 1962 book by Thomas Kuhn
The obsolete United States Navy hull classification symbol for a diesel-electric radar picket submarine
Sustained silent reading, a form of school-based recreational reading
Self Supporting Run-flat tires, a type of run-flat tire
Svenska Scoutrådet, the national Scouting and Guiding federation of Sweden
In air travel passenger name records, a Special Service Request
Same-sex relationship
Short-sale restriction, a modified uptick rule instituted by the U.S. Securities and Exchange Commission (SEC) in 2010
Somali State Resistance, a rebel group in Ethiopia