glossary of CNC terms for a real newbie??

Is there a good glossary of CNC terms any where out on the web?
Things like:

Y = front to back
X = right to left
Z = up and down
F = feed rate

and so on.

It may seam really simple but with me being new to cnc it is a good place to start as I want to learn to write/edit code for simple parts.

Thanks in advance



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