Abbreviations nightmare!

[Cymrudragon]

Is there a reason that Abbreaviations are used so much ??
not every one knows there meanings.
a typical post reads ....Help my ep and omb came loose from bcu unit,
right you may know what it means but what about the rest of the members who dont?. please use the word and not the abbreviation with exeption to the obvious one's eg,etc which are in genaral use.
or put a list up of them all