Karate history

The four major styles of karate
(as recognised by World Karate Federation)

Shito-ryu - Mabuni Kenwa (founder)
Goju-ryu - Miyagi Chojun (founder)
Shotokan - Funakoshi Gichin (founder)
Wado-ryu - Hironori Otsuka (founder)

Kata Classification
Shuri-te
high positions which allow fast changes in movement.
Naha-te
Low stances, power in the execution of techniques.
Tomari-te
A combination of the other two.

Sankukai-related people I should know about
Nils Edelstam -
Owe Stjernström -
Yoshinao Nanbu - Founder of Sankukai
Chojiro Tani - Founder of Tani-ha Shito-ryu
Mabuni Kenwa - Founder of Shito-ryu

Some Katas and their classification
Seienchin - Naha-te
Seipai - Naha-te
Sanchin - Naha-te
Bassai-dai - Shuri-te
Ananko - Shuri-te
Rohai - Tomari-te