This document discusses open access publishing. It defines open access as publications that are freely available online without financial, legal or technical barriers. There are two main routes to open access - gold open access publishes the final version freely after publication, while green open access involves self-archiving in a repository. Benefits of open access include increased citations, wider collaboration, and compliance with funder mandates. The document also discusses article processing charges, open access journals from Springer and Elsevier, and Indian open access repositories.