@niconiconi
They even still have a recommendation on Morse code (#CW). ITU started as "International Telegraphic Union" long time ago... Some recommendations given in that document do not coincide with the actual practice of the #hamradio CW sub-community, the most sizeable community that still does it.
@dj3ei The most famous ITU publication is probably the Radio Regulations (ITU RR), the legal basis of the use of radio spectrum worldwide, all serious ham radio operators should take a look. It's quite an interesting document.