CompTIA A+ Complete Study Guide: (Exams 220-601/602/603/604)
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Emmett Dulaney, A+, MCSE, has written over 30 books on Windows, Security, IT project management, and UNIX, and is the certification columnist for Redmond Magazine and CramSession.com.
Toby Skandier, A+, is a technical education developer for Sprint Corporation. He has coauthored numerous books, including the bestselling CompTIA Network+ Study Guide.