[GreenKeys] Happy Pi Day!

[Dave Horsfall]

In US notation today is 3.14, and "pi" underpins many things; remember 
that, when the wheels on your RTTY go round and round...

Trivia: my other favourite transcendental number is "e" (2.71828...), and 
did you know that e**(i*pi) + 1 == 0?  That is the world's most famous 
identity, combining as it does the mathematical constants "e", "i", "pi", 
1, 0, and the fundamental operators of addition and equality.

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."