Class 79 may refer to.
In 1922 the Deutsche Reichsbahn began to develop a renumbering plan to standardize the numbering of steam locomotives that had been taken over from the state railways (Länderbahnen).
The Klien-Lindner axle (German: Klien-Lindner-Hohlachse) is a special type of hollow driving axle on steam locomotives that enable better curve running due to its ability to slide transversely.
The railway vehicle classes covered by this list of DRG locomotives and railbuses belonged to the Deutsche Reichsbahn-Gesellschaft or DRG (1924–37) and its successor, the Deutsche Reichsbahn or DRB (post 1937).
This list contains the locomotives and railbuses of the Royal Saxon State Railways (Königlich Saxon Staatseisenbahnen) and the locomotives of the Leipzig–Dresden Railway Company.
Under the Whyte notation for the classification of steam locomotives, a wheel arrangement refers to a locomotive with two engine units mounted under a rigid locomotive frame, with the front engine unit pivoting and each engine unit with six coupled driving wheels without any leading or trailing wheels.