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.

Add a Cargo Deck to Your Bike

Cargo bike

The FreeRadical bolts to the rear of your current bicycle and lets you to carry up to 200 lbs of cargo, equipment or passengers. It extends the frame 17 inches, weighs a mere 5 lbs and fits most 26" diamond frame bikes. On sale until the end of the month for $399, direct from XtraCycle.

Maker Faire FreeRadical Deal [via Make]

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