1960s
- Portable audio formats: 8-track and four-track cartridges vs. Compact Cassette, and the lesser known and largely forgotten Deutsche Cassette (introduced by Grundig). While rather successful into the mid-to-late 1970s, the 8-track eventually lost out due to technical limitations, including variable audio quality and inability to be rewound. Similarly the smaller formats of microcassette, developed by Olympus and minicassette, developed by Sony for applications requiring lower audio fidelity such as dictation and telephone answering machines.
- FM radio stereo broadcast formats: The Crosby system and the GE/Zenith system. The Crosby system was technically superior, especially in transmitting clear stereo signals, due to its use of an FM subcarrier for stereo sound rather than the AM subcarrier employed by GE/Zenith. Many radios built in this period allowed the user to select Crosby or GE/Zenith listening modes. However the Crosby system was incompatible with the more lucrative SCA services such as in-store broadcasting and background music. FM station owners successfully lobbied the FCC to adopt the GE/Zenith system in 1961, which was SCA-compatible.
Read more about this topic: Format War