It would be nice if somebody would compile a glossary of the various acronyms (ATTI, OTG, etc.) and maybe one of the board moderators could make it a sticky for the rookies.  I am beginning to understand most of them but it would be useful to have them all in one spot.

If not set as a siticky post maybe they could be in added to one of the tutorials.

Let me start with some of the stuff I know.

OTG-   on the go
AC-      aircraft
RC-      remote control
ATTI-   Attitude or the quad's level (as in upright) and altitude are maintained

IMU-    Inertia Measurement Unit

ESC-   electronic speed control
PROPS-   propellers

Sorry, memory kicking in and out.

GPS-   global positioning system

MC--main controler for aircraft

Lucas, thanks for your help.
CE/FCC mode:
FCC certification is the US mandatory certification while CE is the EU mandatory certification.
The aircraft will adjust itself automatically according to customers’ location.
If you have questions about the new word, you can also post here. We are willing to help.

FW = Firmware

LOS.      LINE OF SIGHT
VLOS.    VISION LINE OF SIGHT
BVLOS.  BEYOND VISION LINE OF SIGHT