Age when they co-founded these tech companies:

Bill Gates (Microsoft): 19
Steve Jobs (Apple): 21
Sandra Lerner (Cisco): 29
Jeff Bezos (Amazon): 30
Reed Hastings (Netflix): 36
Robert Noyce (Intel): 41
Diane Greene (VMware): 43
Charles Flint (IBM): 61
Dave Duffield (Workday): 65