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Historical and Economic Development of Computers (Part 1)

IBM plugboard | IBM 513, I believe. Not sure the purpose of … | Flickr

The Heritage of

South Africa’s first computers

Computer Modules - IBM, circa 1965

About the Computer History Museum’s IBM 1401 Machines | @CHM Blog

Apex Plus PoE-GigE-48 Installation – Trango Support

Examining the core memory module inside a vintage IBM 1401 mainframe

1950's tax preparation: plugboard programming with an IBM 403