Star Trek is the most popular science fiction franchise in the world and it has a very large following of loyal fans who are known as Trekkies. The main Star Trek costume in the numerous television and movie series is the uniform worn by the organisation known as Starfleet. This uniform consists of various a red, blue or gold colored jumpsuit like outfits that were either one or two piece. Red is worn by engineering and security personnel, blue is for science and medical personnel and gold is for command and the bridge crew.In the earlier TV series of Star Trek the female uniform featured a short skirt, in later series all crew uniforms became trousers or one piece jumpsuits. Starfleet costumes all feature a removable combadge that is located on the chest and acts as a logo and also as a communication device. Other accessories that can be carried are a phaser and a tricorder which is a scientific instrument that is used for taking measurements.