Examines common PC operating systems (os's) in use today. Students acquire the skills to install, configure, upgrade, and troubleshoot DOS, Window 95x, NT, 2000 and xp desktop operating systems. Students will be introduced to alternate OS's such as Unix, Linux, OS/2 and Mac 0S and will acquire the skills cecessary to prepare for the computing Technology Industry Associations (CompTIA), A+ Operating Systems Technologies certification exam. This exam measures the essential operating system competencies for an entry-level desktop computer service technician.