Documentation for Wolfram Language: https://reference.wolfram.com/language/ https://reference.wolfram.com/language/ It's detailed, complete, shows many exampl

Documentation for Wolfram Language: https://reference.wolfram.com/language/ https://reference.wolfram.com/language/ It's detailed, complete, shows many examples for commom use cases, 'neat' examples showing what's possible, and lists down possible issues. I do see certain documentation quality issues sometimes. The documentation itself is done using the features of Wolfram Language, so the examples can be run inline (depending on the platform).