Grace Hopper
(December 9, 1906-January 1, 1992)
Rear Admiral Grace Hopper, USN, Ph.D., or "Amazing Grace" as she is often known to her admirers, was a computer scientist and programmer whose pioneering work on early computers as well as her amiably no-nonsense attitude when teaching continues to inspire.
She is known for distributing "nanoseconds," lengths of wire spanning the distance light travels in that amount of time, at her speaking engagements.