R
RM
RealMedia File. RealMedia is a multimedia container format created by RealNetworks. It is typically used in conjunction with RealVideo and RealAudio and is popular for streaming content over the internet. Files using this format have the fi le extension ‘RM’.
RMVB
Real Media Variable Bitrate. RMVB is an abbreviation for Real Media variable bitrate. It is a type of video fi le, playable with RealPlayer from RealNetworks. RMVB is commonly used to contain Real Video 9 and RA (Real Audio). Files using this format have the fi le extension ‘RMVB’ or ‘RMV’.
W
WMA
Windows Media™ Audio. Refers to an audio compression technology developed by Microsoft Corporation. WMA data can be encoded with Windows Media player version 9 or Windows Media player for Windows XP. Files are recognized by their fi le extension ‘.wma.’