33
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 30, 2025
6357435
602119
2
Public Timelines
FAQ

jan 1, 1550 - John Napier invented a simple addition device

Added to timeline:

Date:

jan 1, 1550
Now
~ 476 years ago