What are the different Tour de France jerseys?

From: Chris Murphy

Chauner and Halstead (1990) in "The Tour de France Complete Book of Cycling" explain:

YELLOW Jersey -- Overall leader, first awarded during the 1919 race (TdF started in 1903); yellow to match the paper used to print L'Auto (Automobile Cyclisme), a French newspaper about bike racing.

POLKADOT Jersey (White w/red dots) -- Best climber, determined by points scored by the first 3 to 15 riders finishing selected mountain stages (number of riders awarded points varies with the difficulty of the stage). First awarded 1933.

GREEN Jersey -- Points jersey, usually won by sprinter-types, with points given to the first 25 riders to finish each stage. First awarded 1953.

YELLOW Hats -- First place team, determined by combined elapsed times of the the team's top 3 riders.

In the event of a rider leading the race and also deserving one of the other jerseys, the race leader wears yellow, and the 2nd place in the category wears the category jersey.