You will find all relevant API information, naming conventions, an overview about the directory structure and many more information. The sheet is devided into two sides - one for Extbase and the other for Fluid.
License
This cheat sheet is licensed under Creative Commons-ShareAlike license. It has been created by Patrick Lobacher, with help from Jochen Rau and Sebastian Kurfürst.
Remarks of the TYPO3 Editorial Team: The current version and all other Cheat Sheets can be found on https://docs.typo3.org/m/typo3/docs-cheatsheets/master/en-us/.