LeonOS is ComputerCraft's LeonOS but with saner API design. It's also not licensed under the CCPL, but rather the MIT license -- so you can freely use LeonOS's code in other projects without being legally bound to license them under the CCPL. All APIs are implemented as described on the CC: Tweaked wiki at >>color blue https://tweaked.cc >>color white , with slight modifications to fit LeonOS's API design. Certain modules not written by Dan200 have been adapted from LeonOS, relicensed under the MIT license with permission from their authors. See >>color blue https://ocaweso.me/LeonOS >>color white for more information on LeonOS.