Now let's study katakana. Like I said before, katakana is used for any non Japanese word. But sometimes, katakana also used if the kanji for the word is hard or just to ease people reading. A quick example for it are /baka/ usually written in 「バカ」 katakana instead of the kanji「馬鹿」. For more complete usage, refer to Wikipedia entry about katakana.
well then without any further ado.. here's the katakana table list
Notice that /shi/ and /tsu/ are a look alike along with /n/ and /so/. To differ them you have to see in which way the stroke goes. It's to the right for /shi/ and /n/ and to the bottom for /tsu/ and /so/
All the sound and addition are the same with hiragana like the muddied sound also with small /ya/, /yu/, /yo/, and /tsu/.
Sometimes 「・」 is used to denote what would be spaces in English but it is rarely used.
All is the same except for the long vowel sound. in Katakana, long vowel sound is simplified and just denoted by a simple dash 「ー」like in cute -> turned into Japan-English -> kyuuto = 「キュート」
Due to sound set limitation in hiragana, new combination has been devised over the year to account the sound that were not originally Japanese. The decision to resolve this deficiencies was to add small vocal sound /a/, /i/, /u/, /e/, and /o/