(Nearly) Useless Trivia: IEEE naming convention

IEEE standards often have strange names such as 802.1ah.  Ever consider there was a difference between standards that have lowercase trailing letters as opposed to uppercase?  Well, there is a diffreence:

The IEEE project naming convention uses upper-case letters (eg: 802.1Q) to identify standalone standards, and lower-case letters to identify amendments (previously known as supplements) to existing standards. There should never be 2 projects differing only in the case of letters!

Taken from itcertnotes.