Programming Calculators: (3) lessons

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Excel Formula Tutorial
This is a downloadable interactive excel file tutorial showing you functions in Excel with examples.
It allows you to change input in blue, and the tutorial notes will dynamically update so that you can learn fast.
Also contains an instant search box that will return excel function information immediately as you type

Fortran Function Tutorial
A Search Engine with definitions on Fortran functions

MySQL Function List
A Search Engine with definitions on MySQL functions used to query