@Wizard Welcome to the forum :slightly_smiling_face:
The most important Acronyms/Glossary-Threads you will find in the Player Help-Category , especially these two stickies:
https://www.axisandallies.org/forums/topic/4193/list-of-standard-acronyms-noob-confused-by-ipc-ic-fig-kjf-etc/
and
https://www.axisandallies.org/forums/topic/17402/axis-and-allies-acronyms-commonly-used/