A lot would depend on what you were listening to. If it was an En Route (Area) control centre then most of what you heard is probably reporting points. These are 5 letter points in space which aircraft use to navigate, they are usually something to do with a town or city nearby, for example LOMON is overhead Loch Lomond in Scotland, sometimes they don't make any sense at all, these are usually points in space situated over the sea, I may be wrong but I think that there are points over the North Sea called KOMIK, BEENO and DANDI (BEENO and DANDI are comic books in the UK)
The different radar channels are the "sectors" which are the different bits of airspace controlled by different Air Traffic Controllers, each on has it's own radio frequency which the pilots use to talk to the controller operating that particular radar screen.