Lotus Notes/Domino is an integrated application that combines functions like email, calendaring, documents, databases, and websites into a single client-server platform. It works on a model where the Domino server handles backend functions and the Notes client provides access for users. Over time, Lotus Notes/Domino has expanded to include additional features such as instant messaging, mobile access, and social networking integration. The latest version, Release 8.5, provides improved web capabilities and integration with other applications and platforms.