Pretty useable though. It's more of a glossary that explains the meaning of the (very short) command names and sends you to the proper Volume (in roman numerals

Pretty useable though. It's more of a glossary that explains the meaning of the (very short) command names and sends you to the proper Volume (in roman numerals) those are sorted alphabetically. Considering most users would probably be reading this on a fan paper printout, an index like this was probably quite good ergonomically.