Acronyms are words that are formed from the first letters of other words.
Before using most acronyms, the first mention should spell them out followed by the initials in rounded brackets – thereafter, just use the acronym.
For example:
You can update your Tax File Number (TFN) at the Australian Tax Office (ATO). Once you’ve updated your TFN, let us know.
For well-known acronyms, you don’t need to spell out them out.
For example:
ATM, PIN, BSB, SMS, PDF, URL
NSW, Qld, SA, Vic, ACT, NT, WA, Tas
Note: Don’t use full stops between letters.
Don’t use acronyms for product categories.
For example:
Do: credit card, home loan
Don't: CC, HL