Book excerpt: Thanks to the pervasive use of computers, cell phones, and various hand-held devices, information technology is a hot career field. Packed with pertinent information on the benefits of vocational training, this handy guide reveals how readers can become IT professionals. Included are tips for career preparation while in high school and vo-tech and certification resources. Real-world examples, derived from interviews with workers in the field, provide the voice of experience that today's students--and tomorrow's workers--crave.