Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Get premium

Create a timeline

Public timelines

About & Feedback Terms Privacy FAQ

Cabinet Get premium

Donate

jan 1, 250 BC - Abacus

Description:

Calcualtor-s a mechanical device designed to make arithmetic calculations easier.

Added to timeline:

Timeline

ByIvana Antoine

17 Oct 2017

0

0

354

Date:

jan 1, 250 BC

Now

~ 2277 years ago

Images:

About & Feedback Terms Privacy FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL