Karate or karate-do is a budo art, a Japanese martial art introduced to the Japanese main islands from Okinawa in 1922. Karate emphasises striking techniques (i.e. punching and kicking) over grappling. Karate training can be divided into three major parts, kihon, kumite and kata. Kihon is the study of basic moves. Kumite means 'sparring' and develops from well defined forms to the free form named randori. Kata  means 'forms' and is a fight against imaginary enemies, expressed as a fixed sequence of moves. 

Within karate there are a multitude of different styles or schools.

American Freestyle Karate.

American Kempo.

Cha Yon Ryu.

Full-Contact Karate.

Goju-Ryu.

Isshin-Ryu.  

Kempo.

Kenpo (Kosho Ryu).

Kempo (Ryukyu). Ryukyu Kempo (which roughly translates into Okinawan kung-fu, or Chinese boxing science)

Kobo-Jutsu.

Kyokushin-Kai.

Shohei-Ryu (formally known as Uechi-Ryu).

Shorin Ryu.

Shorinji Kempo.

Shorei Ryu. 

Shotokai Karate-do.

Shotokan Karate.  

Wado-Ryu Karate.