Firstly, we have a thread for smaller beyblade questions, the aptly named 'Ask A Question, Get An Ansewr' thread. You should post stuff like this there in the future.
Secondly:
HMB - Heavy Metal Beyblades (the system that came after plastics)
FMB - I think you mean MFB, means Metal Fight Beyblade, the current system and series
EG - Engine Gear, a special type of spin gear for plastic beyblades
I'm pretty sure we have a list of abbreviations on the wiki somewhere anyways....