Spies, that is. Mental Floss has collected highlights from the (Central Intelligence Agency’s) Directorate of Intelligence Style Manual & Writer’s Guide for Intelligence Publications. Before you drop the microfiche into the third trash barrel on the west side of the park pond at 12:20 on Tuesday, double check your report for these common errors:
http://mentalfloss.com/article/57743/11-grammar-lessons-leaked-cia-style-book