1947-12-23

Switch to the dark mode that's kinder on your eyes at night time.

Switch to the light mode that's kinder on your eyes at day time.

Switch to the dark mode that's kinder on your eyes at night time.

Switch to the light mode that's kinder on your eyes at day time.

This Day in History: 1947-12-23

(December 23, 1947)
Bell Laboratories is the first to show the transistor.
photo source: wikimedia.org