Dan Oja Dan Oja is an American computer programmer, author, and co-owner of MediaTechnics Corporation, which develops computer textbooks and educational software marketed by Course Technology, a division of Cengage (formerly Thomson Learning). Dan has co-authored over 150 best-selling college computer textbooks including New Perspectives on Computer Concepts and the historical, non-fiction novel Ordinary Heroes: Six Stars in the Window. An experienced programmer, Dan has developed numerous software products for education and digital publishing - including the BookOnPublish Digital Publishing System used to deliver college computer textbooks to hundreds of thousands of students all over the world. This is also the technology used create the digital versions of Ordinary Heroes: Six Stars in the Window. Dan also taught martial arts for many years and holds a 5th-Degree black belt in the martial art of Taekwon-Do.
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