Here we try to list keywords from every known BASIC implementation, inspired by The BASIC Handbook by David A. Lien.
You will surely find some keywords are missing, and contributions are more than welcome. Please adhere to the template used for these pages, so we can keep this information as structured and standardized as possible.
Would you like to see only keywords supported by a specific BASIC implementation, check the BASICs we know of section: each page for a BASIC version has a listing of its keywords documented here.