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History & Retro Computing

The most popular blog posts about history & retro computing on Hacker News. 422 posts.

2023
5

The Mystery of the Bloomfield Bridge

This pedestrian bridge crosses I-494 just west of the Minneapolis Airport . It connects Bloomington to Richfield. I drive under it often and I wondered: why is it there? It's not in an area that is particularly walkable, and it doesn't connect any establishments that obviously need to be connected. So why was it built?

15

Why was Roman concrete so durable?

Researchers have discovered ancient Roman concrete-manufacturing strategies that incorporated self-healing. Applying this knowledge toward modern cement production, they hope to improve the material’s environmental impact.

21

Xmas.c (1988)

The second block has more real work going on. If the character stored in the variable _ does not match the first character of the string a , the code recurses in such a way that this same block of code will again be entered. That is, t=-65 forces a return to the if (t < -50) block. The recursion steps through string a…

28

Apollo 11 vs. USB-C Chargers (2020)

I think it is healthy to compare historical and modern computing. Let's see how the CPUs contained in recent USB-C wall chargers compare to the power of the Apollo 11 Guidance Computer (AGC). The Apollo 11 spacecraft carried 3 humans to the moon and back in 1969.