Deletion of T-code

Comment: The topic easily passes  because entire books are written about it: https://books.google.co.uk/books?id=FtGrDgAAQBAJ; https://books.google.co.uk/books?id=55zCbwAACAAJ; https://books.google.co.uk/books?id=MePjHgAACAAJ
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG)