has been using and programming computers since the mid-1970s, when he first punched IBM punch cards for batch processing to solve engineering problems. Now Don is a nationally recognized author, instructor and consultant who travels the country sharing his expertise in SQL Server and security. He has written business software using assembly, C/C++, dBASE, Nantucket Clipper, RPG II, C#, and Visual Basic for a variety of industries, and has taught software and business administration courses at community colleges. Now Don is an author and presenter for and a consultant for a variety of companies that develop distributed applications for public and private organizations. Don is also the author or coauthor of several programming books, and a featured speaker at SQL Server conferences.