S.T.S. (also STS; acronym for "Steinbäcker – Timischl – Schiffkowitz") was a three-member Austropop band from Graz in Austria. Its most famous songs are "Großvater", "Irgendwann bleib i dann dort", "Gö, du bleibst heut Nacht bei mir" and "Fürstenfeld".

The trio was founded in 1978 by Gert Steinbäcker, Günter Timischl and Schiffkowitz (real name Helmut Röhrling). All three members are from Styria, a fact that is repeatedly referenced in the group's songs. The three musicians played acoustic guitar and sang the chorus of their songs in three-part harmony whereas the solo part was sung by the composer with a few exceptions. Instrumentation and vocals reveal influences of bands such as Crosby, Stills and Nash.

S.T.S. recordings have gone gold three times, platinum eleven times, double-platinum three times and quintuple platinum once. The band sold 2.5 million albums. Its fame and popularity is based on loyalty to the trio's own musical concepts and its live performances. S.T.S.'s most popular songs include Fürstenfeld, Da kummt die Sunn (Here Comes the Sun), Großvater (Granddad), Gö, Du bleibst heut Nacht bei mir (Help Me Make It Through the Night), Kalt und kälter (Cold and colder), Mach die Aug’n zu (Close your eyes), Wunder meiner Seligkeit (Wonder of my bliss), Überdosis G’fühl (Overdose of feeling) und Irgendwann bleib i dann dort (One day I'll stay there).