Public radio’s longest-running daily global news program.

Podcasts
Station Finder
Newsletter
Donate

Episodes
Segments
Stories

By Category
By Country
By Contributor

About
The Team
Contact
Privacy

Facebook
Instagram
Twitter
Bluesky
TikTok
Youtube

About Contact Donate Meet the Team Privacy Terms of use

©2025 The World from PRX

PRX is a 501(c)(3) organization recognized by the IRS: #263347402.

mechanical calculator

An image of the Monroe PC-1421 with its cover removed.

Here’s the impossibly complicated way calculators used to look

Dec 17, 2014

Produced By

Thanks To Our Sponsor

Major Funders