bike monitor

Gwenski

Hello there..
My recumbent bike monitor has different numbers on it. Some of them I think I know.. the rest I don't can anyone help?

The first one has the letter A beside it.. not sure what that is
The next one has an S.. I think that is speed.. is it in miles per hour?
The next one has a D.. Distance? would it be in miles?
The next one is a T.. pretty sure that is time
The next one has an O beside it.. Odometer? Is that the total distance taken on the bike ever?
The next one is C.. I'm guessing that is calories?

Mostly, I'm curious about the A and if the speed and distance are miles

Thank you so much for helping me.