Contrary to the methods used by the Reich Air Ministry (RLM) for the allocation of aircraft designations, the designers and manufacturers of sailplanes and gliders in Germany enjoyed the freedom of choosing their own designations for their products up until 1945. Thus a bird name like Habicht could be used, or a number combined with two or more letters, stemming from the designer's or factory's name, such as DFS, RRG or Göppingen. The RLM only assigned them for every design a separate number, which obviously served the same purposes as that used with aircraft, namely to provide a common basis for an exchange of drawings in the event of an intended production under license by other firms or by clubs, or even single persons and to secure the provision of spare parts. A rigid system of rules for the form and order of drawings was applied. Whereas RLM aircraft designations were prefixed by the number 8, glider references began with "108-", for example 108-53 referred to the DFS Habicht. In a relaxation of the regulations regarding allocation of aircraft designations, the designers and manufacturers of sailplanes and gliders in Germany enjoyed the freedom of choosing their own designations for their products up until 1945, but some of the more common aircraft were issued RLM designations in the 108 series. 108-10Schneider Grunau 9 - primary glider (1929) 108-11RRG Zögling 33 - primary glider (1933) 108-14DFS Schulgleiter SG.38 - standard basic gliding trainer (1938) 108-15RRG Zögling 12m - primary glider (1934) 108-16Weber EW-2 - four-seat high-performance sailplane 108-21Hirth Hi 21 - two-seat sailplane 108-22Hirth Hi-20 MoSe - (for Motorsegler = motor glider); motorized glider 108-29Fliege IIa - primary glider (1935) 108-30DFS Kranich II - two-seat sailplane (1935) 108-47Schleicher / Jacobs Rhönadler - single-seat high-performance sailplane (1932) 108-48Dittmar Condor I - high-performance sailplane (1932) 108-49Schneider / DFS Grunau Baby II - glider (1932) 108-50Jacobs Rhönbussard - single-seat high-performance sailplane (1933) 108-51Jacobs / Schweyer / DFS Rhönsperber - single-seat high-performance sailplane (1935) 108-53DFS Habicht - single-seat acrobatics sailplane (1936) 108-56Dittmar Condor II - single-seat high-performance sailplane (1935) 108-58Hirth Göppingen Gö 1 Wolf - sailplane (1935) 108-59Hirth Göppingen Gö 3 Minimoa - high-performance sailplane (1935) 108-60Jacobs / DFS Reiher - single-seat high-performance sailplane (1937) 108-61Hütter / Schempp-Hirth Göppingen Gö 4 - two-seat sailplane (1937) 108-62Schwarzwald-Flugzeugbau Donaueschingen Strolch - high-performance sailplane 108-63Akaflieg München Mü 13D Merlin - high-performance sailplane (1936) 108-64Schwarzwald-Flugzeugbau Donaueschingen Ibis 108-65Dittmar Condor III