I started using slide rules around grade 7 and became reasonably proficient by grade 10.  Unfortunately for the slide rule, scientific calculators were becoming popular at the time, and I acquired an inexpensive Novus 4640 in grade 11.  This was an RPN style calculator which cost fraction of the HP25 that my high school had.  So I put down my slide rules for a few years.  I have recently rekindled my admiration and fondness for the slide rule, and I am learning how to use them again.   Here will document some of the rules I have and why I like them.