The IS-3 ABC (Instytut Szybownictwa – Gliding Institute) was a single-seat training glider designed and built in Poland from 1947.

Using the sole remaining W.W.S.1 Salamandra as a starting point, the IS-3 ABC emerged looking similar to most primary gliders, with a high set rectangular low aspect ratio wing, wire-braced to an open structure wire-braced fuselage, which did nothing more than connect the seat, skid and tail unit to the wings.

The IS-3 ABC prototype first flew on New Year's Eve of 1948 by Peter Mynarski and after successful trials, a production commenced as the IS-3 ABC-bis.

Polish instructors were also instrumental in boosting the gliding movement in the People's Republic of China, providing instruction and advice with the 50 IS-3 ABC A's exported there.

The IS-3 ABC series was in use at Polish state gliding clubs up to 1961, when the dual training syllabus was finally introduced.