I think the wikipedia definition may help you out!
"The first course in a subject taught at a college or university in Australia, Canada, South Africa, or the United States. By extension, 'Topic 101' is used generally to indicate the basics of any subject. Used this way, it is always pronounced 'one-oh-one'"
I don't want to disagree with Wiki, (or maybe I do) but I know in Canada that university and college courses are not labled 101, 102, etc. Generally the classes' code is created by a set of numbers that relate to the faculty, departement, year, and class section. For example a first year introductory class from the University I went to would be: 0302167, which would be 03 for faculty of science, 02 for department of biology, 1 for first year, 67 for the class section. The number has nothing to do with the course being and introductory course or not.
I'm assuming since Golden Guardian asked this question first, it's probably something similar in Australia.