Commercial acceptance has traditionally been a guideline for national standardization to insure that through practical experience the dimensions and specifications are reasonably valid. To obtain equivalent reliability, the early standardization of the super-8 system required the prerequisite of an informed industry. National standards have been approved on almost all of the 29 subjects of the super-8 system originally considered as standard proposals. There is considerable feeling in the industry that there is insufficient standardization, principally in the use of super-8 sound film in cassette or cartridge projection systems.