Is it a standard to call outputs "Y" on ICs???

Evenin' all....

I had noticed a while ago that on an L293 each input and its associated output is an A/Y pair. And now this evening I was browsing components in Eagle and I note for example an AND gate has inputs AB and output Y.

Is the AB and presumably CDE etc depending on number of inputs and Y as an output, a standard, either de facto or de jure?

Is the AB and presumably CDE etc depending on number of inputs and Y as an output, a standard

Yes