Candidates for CompTIA A+ need to pass the A+ 801 exam and also the A+ 802 exam. The 801 exam tests for technical understanding of computer technology, networking and security. It also tests for communication skills and professionalism required of entry-level IT professionals. Virtualization and mobile devices are also heavily covered.
There is significant overlap between the two exams. It therefore makes sense to study for both exams together.
After passing the A+ exams, the next logical move would be to earn an OS specific certification. By passing the MS Exam 70-685 Windows 7 Enterprise Desktop Support Technician exam, you complete part of the requirement for earning the Microsoft Certified IT Professional (MCITP): Enterprise Desktop Support Technician 7 certification.