Wingpilot wrote:
Perhaps for those who are new to photography, we can simply refer to these things as apertpriority, shutter priority, manual, program or auto, rather than using acronyms. Then no one has to ask what they mean.
We do use those terms. I believe the OP is asking why the manufacturers don't use the same markings on their cameras to denote those terms. I am probably wrong but I think the only one that is pretty much standard is P for Program. I use Nikon. I know what A-Aperature priority , S-Shutter Priority, P-Program, or M-Manual means but I have no idea what Canon's AV or TV mean or those of any other manufacturer.