racerx said:if you can't do pic's (which would be the best method), write down as many names you can find on the bikes components (parts).
Look at the crank arm (the part with the pedals)
Look at the rear deraileur (the part in the back that holds the chain on the rear wheel cogs)
You may see:
Shimano Ultegra, 105, Dura-Ace
Campagnolo Mirage, Athena, Record
Look at the rims on the wheels, the part that holds the tires on. Usually the maker has their name either on a sticker or engraved in the rim. What names do you see there?
Is this an old bike? Since you posted the question in retro forum, I am assuming it is an older bike, say 10 or more years old. Does that sound right?