Software & computers
Some software is patentable under Australian law.
There have been many important decisions and the law is in flux, as discussed on my blog Software Patents Considered.
As the cases discussed on the blog demonstrate, it is in many cases possible to a draft patent specifications that may proceed to grant.
It is, however, very important to have a software patent drafted by a patent attorney who is aware of software specific legal issues and tricks to get a software patent application past the patent office.