This presentation discusses open access publishing. It defines open access as publications that can be freely accessed via the internet. Two main models of open access are described: open access journals, which are freely available online, and traditional subscription journals that allow some form of open access, such as immediate open access or open access after an embargo period. Advantages of open access include wider dissemination and impact of research. The presentation also discusses Macquarie University's open access policies and institutional repository, as well as mandates from funding bodies like the Australian Research Council that require depositing publications in open access repositories.