Karin Rex is a nationally known technology trainer and frequent speaker on various facets of the Internet, as well as other technology-related topics. Since 1989, Karin has owned ComputerEase, a computer training and technical writing firm based in Pennsylvania, where she devotes her time to writing, course development, consulting, teaching, and speaking.

Karin is the author of several technology-related books, including the following: Internet Search Techniques (Ziff-Davis Publishing, now in its third edition), The Internet Illuminated (Skillpath Publications), and Computers in Clinical Practice (American College of Physicians). In addition to the books listed, Karin has written hundreds of user guides, reference manuals, tutorials, and course manuals for a wide variety of clients. Her future goals include a syndicated column and mainstream (i.e. non-geeky) magazine writing.

Karin is a pioneer in online learning, having been involved since 1996 as a course developer and instructor for Element K, SmartPlanet, and Powered, Inc. (the creative force behind online universities for HP, Sony, and CodeWarrier, among others).