Bill Calkins is a Sun Certified System Administrator for the Solaris operating environment. He is owner and president of Pyramid Consulting Inc., a computer training and consulting firm located near Grand Rapids, Michigan, specializing in the implementation and administration of Open Systems. He has more than 20 years of experience in Unix system administration, consulting, and training at more than 150 different companies. Bill has authored several Unix textbooks, which are currently best sellers and are used by universities and training organizations worldwide. Bill has worked with Sun Press and Prentice Hall as a technical editor and a major contributor to many of their Solaris titles. Bill's professional interests include consulting, writing, teaching, traveling, and developing Web-based training materials. Bill works as a consultant with the certification group at Sun Microsystems and assists with the development of the Solaris 10 SCSA, SCNA, and SCSECA certification exams. Bill also consults with Sun Microsystems Professional Services and assists in the development of Solaris training and testing materials for the education division at Sun Microsystems.