Microsoft has quietly introduced, as part of the Microsoft Graph, the concept of topic, enabling developers to generate a list of people within an organization who are involved with a specific topic. The Microsoft Graph, the successor to the Office Graph and the Yammer Graph, provides developers access to Office 365 data through APIs, enabling them to gather insights into an organization. For example, developers can retrieve a list of people working with a specific person. The retrieved list includes the names of people this person is the most frequently interacting with via any of the Office 365 collaboration tools including Email, Instant Messaging, Teams and Groups. This capability enables developers to develop smarter apps: for example, highlighting in the user interface, the inner circle of people someone works with rather than simply showing the traditional alphabetic list of contacts.