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Grace Hopper on Letterman

TheLazlo101

190 subscribers • 1 video on Hallway

YouTube
  • Recommended by 1 person: 1 on Hacker News.
  • Presented by Grace Hopper, computer scientist and Navy rear admiral

Beginner. No background in the topic needed.

447K views13 years ago1 recommendation

History and cultureHistory of computingPeople who shaped computing

Grace Hopper explains the concept of a nanosecond using a physical piece of wire representing the distance light travels in that time.

Why it's here

1 person recommends this

What people say. Highly recommended as a famous and intuitive explanation of a nanosecond by computing pioneer Grace Hopper.

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No mention of the foot per nanosecond is complete without this seminal scene between the great, late Grace Hopper and David Letterman: link to this video

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On “Belated birthday wishes to pioneering MIT computer scientist and the first female U.S. Navy Admiral, "Amazing Grace" Hopper, born December 1, 1906.”

Interview with Letterman

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Unfortunately, she's not around anymore, but Grace Hopper was great at this. And if you don't know who Grace Hopper was, you should really learn who Grace Hopper was. link to this video

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On “SpaceX plans worldwide satellite Internet with low latency, gigabit speed”

Latency Math (Almost 100ms faster then current technology) EDIT: This is only one way ALSO Grace Hopper telling David Letterman what a nano second is! link to this video 1 Nanosecond = distance light travels one foot 1 mile = 5260 nanoseconds (In a vacuum) Current Satellite Internet = 22,000 miles or 115720000 Nano Seconds = 115.72 ms SpaceX Low Orbit = 715 to 823 Miles 823 miles = 4328980 nano seconds = 4.3 ms

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Lightnanoseconds are a useful measure in everyday life as well. A lightnanosecond is about 30cm, or 1 foot. link to this video