Good Morning, netizen neighbors, my friends and my dear students. 

Good to see you. My name is Yoon, Ho Seong and I am a professor of Dong Seoul College 

located at Seong-nam City in Korea. I'd like to get acquainted with you, and so 

do not hesitate to leave e-mails. I am teaching computer programming subjects for 

junior and senior students. Hereby, I put my lecture outlines here, and I wish those 

materials could be helpful for class attendants. I regret that I did not prepare subsequent

pages for English view, but it won't take long to make them. I am always ready to hear your 

nice live stories. Thanks for visiting here.