Mom, Dad, & family 10%
kindergarden 5%
elementary school 1%
middle school 1%
high school 1%
college (B.S. math) 1%
college fraternity 5%
business school (MBA) 1%
my first mentor 5%
my second mentor 10%
my users over the years 10%
my employers & customers 10%
reading 5%
other programmers 5%
doing on my own 30%
----100%