COM+ is An extension of Microsoft's Component Object Model (COM) that builds on COM's integrated services and features in key areas.
What is COM+
An extension of Microsoft's Component Object Model (COM) that builds on COM's integrated services and features in key areas, including
Dynamic load balancing, which distributes client requests across multiple equivalent COM components
In-memory database (IMDB), which provides quicker data access to applications by lowering overhead
Publish and subscribe services, which provide an event mechanism enabling multiple clients to subscribe to published events and send notification to subscribers when events are fired
Queued components, which let clients invoke methods on COM components using an asynchronous model for increased reliability over poor network connections and in disconnected usage scenarios
Integration of Microsoft Transaction Server (MTS) into COM, which supports attribute-based programming, improvements in transactions, security and administration services, and improved interoperability with other transaction environments through support for the Transaction Internet Protocol (TIP)