Spacetime diagram by Ciro Santilli 37 Updated 2025-07-16
Why should I care when I can calculate new x and new time with Lorentz transformation?
Answer: it can give some qualitative intuition on what is larger/smaller happens before/after based only on arguably more intuitive geometric considerations, without requiring you to do any calculations, see e.g. Figure "Spacetime diagram illustrating how faster-than-light travel implies time travel".
Blade server by Ciro Santilli 37 Updated 2025-07-16
Figure 1. Source. Good image from Wikimedia Commons. In this one we can see how the blades are put vertically, and you get several of them per horizontal rack space, instead of a tipical single rack server going all the way horizontally.
Video 1.
HP Blade Server by Brian Kirsch (2013)
Source.
In the video we can see that it contains RAM, disk storage, we are told about two CPUs, and networking interfaces, so it is a complete computer on its own. He also explains that unlike typical rack servers, each blade unit does not have its own coolers and power supply related hardware, which goes instead on the chassis.
IMEC by Ciro Santilli 37 Updated 2025-07-16
Video 1.
imec: The Semiconductor Watering Hole by Asianometry (2022)
Source. A key thing they do is have a small prototype fab that brings in-development equipment from different vendors together to make sure the are working well together. Cool.
ASML Holding by Ciro Santilli 37 Updated 2025-07-16
As of 2020 leading makers of the most important fab photolithography equipment.
Video 1.
ASML: TSMC's Critical Supplier by Asianometry (2021)
Source.
Video 2.
How ASML Won Lithography by Asianometry (2021)
Source.
First there were dominant Elmer and Geophysics Corporation of America dominating the market.
Then a Japanese government project managed to make Nikon and Canon Inc. catch up, and in 1989, when Ciro Santilli was born, they had 70% of the market.
youtu.be/SB8qIO6Ti_M?t=240 In 1995, ASML had reached 25% market share. Then it managed the folloging faster than the others:
Arm (company) by Ciro Santilli 37 Updated 2025-07-16
Video 1.
Arm 30 Years On: Episode One by Arm Ltd. (2022)
Source.
Video 2.
Arm 30 Years On: Episode Two by Arm Ltd. (2022)
Source.
Video 3.
Arm 30 Years On: Episode Three by Arm Ltd. (2022)
Source. This one is boring US expansion. Other two are worth it.
Qualcomm by Ciro Santilli 37 Updated 2025-07-16
Ciro Santilli has always had a good impression of these people.
Reverse transcriptase by Ciro Santilli 37 Updated 2025-07-16
Converts RNA to DNA, i.e. the inverse of transcription. Found in viruses such as Retrovirus, which includes e.g. HIV.
Radio receiver by Ciro Santilli 37 Updated 2025-07-16
As well put by Wikipedia, a radio receiver has to perform three functions on the signal from the antenna:

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