1) What does it mean by *T rating of a switch*?

2) Where can I find more info on different types of general purpose switches?

T means the switch is rated for switching tungsten lamp loads...the switch contacts can handle the momentary inrush current that the cold filaments will draw.

Rob,
Welcome to ECN,
What sort of a switch is this and what sort of application is this being used in?
I suspect that the T rating, as you refer to is the Thermal Current rating.
Switches, if they are going to be used to interrupt/make inductive loads depend heavily on "AC Ratings", like AC-3 or the like, otherwise the switch contacts will be seriously damaged by the arc created when the contacts open or close.

Got the reply from another member; Grich

T-switches means the switch is rated for switching tungsten lamp loads....the switch contacts can handle the momentary inrush current that the cold filaments will draw.

Interesting but confusing. I'll admit I hadn't heard of T rating and was waiting for an informed answer.
However, I've always thought inductive loads much more demanding of switches, so is T rating a "plus", or more a limitation?