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Pentagon Set to Allow Calculator Use on Military Entrance Exam as Recruiting Slumps
(www.military.com)
This is a most excellent place for technology news and articles.
Pen and paper readily available in a warzone isn't common I believe... Just guessing, never been in an active warzone. Have tried to keep track of stuff doing multi days backpacking hiking trips. Finding a pen and paper in a hurry would suck.