what differences in RM, RAM and RMVB file formats

Please help. I’d just like to know the differences of RM, RAM and RMVB file formats.

Real media file (*. RA, *. RM, *. RAM, *. RMV
they r all the same MORON!!!!!!!!!

I hope ur right

no one is born knowing everything, so please respond back in a little more civilized way next time. anyhow, thanks for your help.

RM stand 4 Real Media
RAMsStand 4 Real Audio Media
RMVB stand 4 Real Media (With) Variable Bitrate.
All of them r the SAME.
I hope that my xplaination would plz U.