#on-This-Day-hackernoon

Stories Published September 25 Throughout History

Mobile App Accessibility Testing 101: WCAG Compliance & Best Practices

/mobile-app-accessibility-testing-101-wcag-compliance-and-best-practices feature image

Published on September 25, 2024

Code Smell 271 - The Hollywood Principle

Published on September 25, 2024

Rethinking Social Media: Bluesky and the AT Protocol’s Approach to Moderation and User Control

Published on September 25, 2024

Migrating User Handles and PDS on Bluesky with AT Protocol’s Decentralized IDs

Published on September 25, 2024

Understanding Decentralized Social Networks

Published on September 25, 2024

The Role of Indexers and the Firehose in AT Protocol’s Decentralized Web

Published on September 25, 2024

Fictitious Play for Mixed Strategy Equilibria in Mean Field Games: Conclusion and References

Published on September 25, 2024

Bluesky and the AT Protocol: Usable Decentralized Social Media: Indexing Infrastructure

Published on September 25, 2024

Historic Tech Events

Mars Observer Mission

1992

The Mars Observer was launched by NASA on September 25, 1992, with the goal of studying the geology, climate, and other characteristics of the planet Mars. The spacecraft was equipped with a suite of scientific instruments, including cameras, spectrometers, and other sensors, that were designed to collect data on Mars from orbit. However, the mission was ultimately unsuccessful, as the spacecraft lost communication with Earth just as it was entering orbit around Mars on August 21, 1993. Despite attempts to reestablish contact with the probe, it was never heard from again.

The Underwater Telephone Revolution

1956

In 1956, On September 25th, the world's first underwater telephone cable was inaugurated, connecting Scotland and Northern Ireland. The copper wire insulated with polyethene and steel armour was laid across the Irish Sea, revolutionizing communication between the two countries. The cable replaced the unreliable radio wave method and paved the way for further developments in underwater communication technologies, enabling efficient communication worldwide.

Motorola Incorporation

1928

Motorola was incorporated on September 25, 1928, by the Galvin brothers, Paul and Joseph, in Chicago, Illinois. The company started off as the Galvin Manufacturing Corporation and initially produced battery eliminators, which were devices that allowed battery-powered radios to be run on household electricity. Later on, the company shifted its focus to the development of two-way radios and other communication technologies and eventually became one of the world's leading telecommunications companies.

MCM/70 Microcomputer Introduction

1973

In 1973, Micro Computer Machines of Canada unveiled the MCM/70 microcomputer on 25th September, one of the earliest commercially manufactured devices that can be considered a personal computer. It had 4KB of memory, a built-in keyboard, and a monochrome monitor, and was marketed to engineers and scientists for data analysis. Despite its high cost and limited capabilities, it found customers in companies like Chevron, Mutual Life Insurance, NASA, and the US Army.