"Mark the engineer"
...I have used Microsoft Windows operating systems since the Government started using them in the early 1990s. I use it on a daily basis as part of my job working for the Army. I am considered an resident expert in all Microsoft operating systems, and am frequently consulted by coworkers, friends, and family. I am well-versed in all Windows versions...
10+ subjects, including algebra 1, algebra 2 and calculus