There's UC Gold In Them There Mobile Business Apps!
When I first started using the term "unified communications" (UC), I was simply trying to expand the old domain of "unified messaging" (UM) to include initiating real-time telephone calls from a message. We had long been doing the reverse, creating voice mail messages from a failed telephone call, and I thought it was time to push the concept further by allowing recipients to easily respond to their voice messages more flexibly.