If completed, a merger of Microsoft and Yahoo would be the world's largest of two computer technology companies and would create a formidable rival to Internet search and advertising leader Google Inc.

NPR: Yahoo Rejects Microsoft Bid

But when it comes to service businesses, the nice thing is that many don't require expensive technology, save for maybe a computer and an Internet connection.

FORBES: Magazine Article

Therefore Social Business is the fifth shift caused by technology after the ages of the mainframe, departmental computer, PC, and the Internet.

FORBES: The Fifth Shift in Business Technology