Few people have heard of it, yet many consider John Blankenbaker's KENBAK-1 to be the first commercial personal computer.

Koss introduced these headphones over 40 years ago, and they remain affordable favorites to this day.

Teach Yourself Celestial Navigation


Here's a nifty site that will teach you to identify 3 constellations, 2 stars, and 1 planet. You'll also learn the essence of nighttime navigation using the stars. Now where did I leave that sextant?

"The night sky has followed you your whole life. It may be the only thing your distant ancestors would recognize today. How much of it do you recognize? Fifteen minutes from now, you will recognize plenty."

Identify constellations, stars, planets and how to navigate at night


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