TaeKwonDo: Although an ancient and once secret Korean art of weaponless self-defense, Taekwondo is now a Korean sport in which either two persons practice methods of unarmed fighting or one person can exercise for both physical fitness and self-defense. Taekwondo is recognized as one of the oldest forms of martial arts in the world.
Karate: Karate is a Japanese martial art whose physical aspects seek the development of defensive and counterattacking body movements. The themes of traditional karate training are fighting and self-defense, though its mental and moral aspects target the overall improvement of the individual
Kung-Fu: Kung-Fu, which originated in the Shaolin Temple in China over 4,000 years ago, is considered to be the oldest Martial Art in the world. It is a highly effective method of self-discipline incorporating breathing techniques to those used in Yoga, body conditioning, ancient exercises, and various methods of fighting techniques. The Kung-fu style uses powerful, graceful dance-like techniques, with considerable emphasis on leg techniques, arm techniques, and mental discipline.
If you didn't know what these marital arts are, I posted the function of them. Let me here your guys perspective!