Introduce myself

Tomorrow morning, I'm going to english talking class, again.
I prepare some talk about myself.
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I'm Hyunsung Joo.
You can call me Ryan.
My major is computer science. I'm a computer programmer.
I make Network program, P2P or distributed computing program, monitoring program and so on.
I have worked for a year in this area.
I withdraw from school temporarily.
Because I enter military service as a solier - special kind of solier.
I work for a company.
Korean defense ministry allow that.
Every korean young man should be in the army for 2 years.
My hobby is watching movie, web serfing and blogging.