1. Larry Ellison
Ellison's plan to roll up the enterprise applications' space has shown no sign of slowing. Oracle has leveraged its strength in the data center to cement its status as one of the world's most important applications and middleware vendors. For more on Ellison's influence, click here.
2. Steve Jobs
Apple’s influence is being increasingly felt in the enterprise.
3. Steve Ballmer
Microsoft has certainly had some challenges of late. Now, the company moves forward—with Ballmer at the helm.
4. Sam Palmisano