A few years ago the ACS geared up to join some sort of peak body for professions. They took the view that they should represent all software professionals of any kind.
Then Engineers Australia put in a competing claim for jurisdiction over software engineers. The scoundrels.
I remember this because I was a student member at the time (hey, free BBQs) and they sent a sob story email to all their members about it.
Basically everybody is pissing on everybody's curtains.