What is the abbreviation of TV, AV, m and A-DEP of camera?

TV: Time value, time (shutter speed) takes precedence.

Av: aperture value, aperture priority

M: manual, manual

Automatic depth of field, automatic depth of field.

The full name of door B is light bulb, which means that as long as the shutter button is pressed, the shutter will open. Generally used for ultra-long exposure.

Aperture/shutter priority is priority, but what is the abbreviation of Av TV?

P is the program