When an instant messenger window acts as an extended User Interface of your enterprise application, with buttons, dynamic forms and customizable workflows, then it is AIM. AIM should not be confused with private chat or enterprise collaboration and communication tools.
Health care / Hospital Application orchestrating interactions, tasks and approvals between doctors, nurses, pharmacy, admin and patients / care takers.
BFSI Application interacting with users for instant notifications and quick help queries through an always on push messenger window without the consumer having to login in to the webapp or mobile app.