Marty Hall is president of coreservlets.com, Inc., a small company that provides training courses and consulting services related to server-side Java technology. He also teaches Java and Web programming in the Johns Hopkins University part-time graduate program in Computer Science, where he directs the Distributed Computing and Web Technology concentration areas. Marty is the author of four books from Prentice Hall and Sun Microsystems Press: the first edition of Core Servlets and JavaServer Pages, More Servlets and JavaServer Pages, and the first and second editions of Core Web Programming.