These are a couple of reference sketches I use -
I should have put them up here earlier now that Avigo Downloads is going away, but here they are anyway.

*The Thermometer sketch has a sketch of a Celsius/Fahrenheit thermometer, 
and some info about water and conversions. This is good when rough approximations are all you need. 

*The NATO alphabet is the word representation for each letter when spelling. 
I use this a lot when spelling names for colleagues overseas, 
but cannot always remember what stands for what.

Both are in white on black and black on white, your choice


