Xah Wolfram Language Tutorial
“Every developer should buy a copy of Mathematica, because it will expand their mind.” —Clojure creator Rich Hickey
About the Author
Xah Lee have been coding Mathematica/WolframLang since 1992, and have been at Wolfram Research Inc. I am a programing language hobbyist, in particular on LISP languages.
Wolfram Language tutorial
start at Wolfram Language (Mathematica) Tutorial for Programers