RealMedia is a proprietary multimedia container format created by RealNetworks. Its extension is ".rm". It is typically used in conjunction with RealVideo and RealAudio and is used for streaming content over the Internet. Typically these streams are in CBR (constant bitrate), but a container for VBR (variable bitrate) streams, named RMVB (RealMedia variable bitrate), has been developed.

Support of RealMedia is available in a wide variety of multimedia players for different architectures/platforms^{[citation needed]}, including RealPlayer and the Real Alternative codec pack. The open source DAP firmware Rockbox has added support for reading RM containers as of 6 July 2009, although only certain formats used in RM files are playable.

Zac Harmon is an American blues musician from Jackson, Mississippi. Harmon is currently signed to Toronto's NorthernBlues Music.

Zac moved to Los Angeles in 1980 in the pursuit of a career in music. He worked as a studio musician, and later, built himself to become a writer/producer. Harmon produced tracks for Black Uhuru's album "The Mystical Truth", which also received a Grammy nomination in 1994.

Zac Harmon (and the Mid South Blues Revue) won the 2004 International Blues Challenge for Best Unsigned Blues Band, sponsored by the Southern California Blues Society of Los Angeles.