Most of the Alphabet in some postings sometimes I think I'm on different planet. 

Any glossary  on here?

The alphabetical Things you see should have a dotted underscore under them. Just put your cursor over them and an explanation is revealed. Like RPM. Try it.

1 hour ago, dripley said:

The alphabetical Things you see should have a dotted underscore under them. Just put your cursor over them and an explanation is revealed. Like RPM. Try it.

 

Not on my cell phone, just get copy or quote.

Desktop only sorry you need a mouse and hover on the dotted underline word.