RM is a proprietary video container created by RealNetworks Inc. – the pioneers in streaming media over the internet market. This format supports DRM and was widely used to stream video and audio data online in the early 2000s with more than 80% of online streaming was in the RealMedia format. RM is supported by iPhone, Android, Windows and Mac. This container is often used by online radio stations. Nowadays it is still necessary to install Real Player plugin to be able to play RM files on such streaming websites.

Is a standard for storing audio files in Apple operating systems. It was developed in 1988 based on the IFF format and is a lossless format – audio data is stored in an uncompressed form. In essence, AIFF is an analog to WAV for the Apple Macintosh platform.