Another interesting part of the story is the user element. The issue was most often triggered by fast, experienced technicians who were able to key commands more quickly than Therac engineers anticipated:
> After strenuous work, the physicist and operator were able to reproduce the error 54 message. They determined that speed in editing the data entry was a key factor in producing error 54.
Some years later, I interviewed at Knight Capital, just a couple of weeks before their blowup. (Dreadful interview at which I did dreadfully, being asked to write C _over the phone_ by a supremely uninterested engineer. Quite a red flag in retrospect.)
> Therac-25 is a great case study for software engineers too, recommend reading the Wikipedia article for anyone who hasn't, it's not too long.
I re-read the original paper every few months, more frequently if I'm working on Safety-of-Life-Critical equipment. Which, given my day job, means I'm re-reading it every couple of weeks at most.
The audience of this website is disproportionately aware of the Therac-25 compared to the general public. For the obvious reason, engineering, but also geographically: The Therac-25 being a North American incident that affected Canada and the US. Whereas Theryc is a French company.
While I do agree with your point, as a Swede not even born when the incidents happen I still knew about it, was brought up in a computer science class.
If I have cancer then whether to trust the radiation machine due to the name is certainly a choice I can make, but you get to own your own priorities in that case.
Exactly what I thought as soon as I learned the name.
It's like, man, how to kill a product?
No pun intended.
It could even work? But you put yourself behind such a poorly placed 8 ball when you do these things. Even among researchers, people are a little superstitious about stuff like this. It's always in the back of everyone's mind.
I doubt any of that is valid. Therac-25 happened 44 years ago, that's a very long time, and many people involved in cancer research today weren't even alive when it happened.
"Theryq" and "Therac" are not quite the same either. The word "therapy" and derivatives of it using "thera" are still used widely across the medical industry.
So I'm not really sure why anyone here is making a big deal about the name of the company being "Theryq".
> Even among researchers, people are a little superstitious about stuff like this.
Being superstitious is not common in the medical treatment world, where weird product names are common.
A doctor isn’t going to include the device’s brand name in their decision process for treating a cancer patient.
The Therac-25 case study is noted in the medical world but not to the same extent as in engineering. The case was a tragedy of bad engineering, but the doctors involved in directing the treatments were not at fault for the radiation over exposures.
I'm someone who never puts any sort of product on my finger nails, and I can confirm that my nails work on my iPhone screen, both when I've lazily forgotten to cut them, letting them get annoyingly long, and if I turn my finger over so that my nail is just about flat on the screen - I checked while writing this, and confirmed the screen was responsive despite my skin definitely not touching it. (I'm a man who doesn't have any experience growing my nails to extend more than a few mm beyond my finger tips so I can't speak to that scenario.)
In December 2025, items worth an estimated €30 million were stolen from a Sparkasse bank in the Gelsenkirchen suburb of Buer, Germany. The thieves used a large drill to break into the bank's underground vault and proceeded to crack over 3,000 safe deposit boxes.
Don’t need events that extreme. Regular branch banks have stuff go missing from the safety deposit boxes shockingly regularly. The locks aren’t particularly secure and various people are able to access them. It can be hard to find articles about them because they don’t make the news like the more remarkable incidents do. Examples of boring security box failures (but that were noteworthy in other ways so they did make the news): Jennifer Morsch, Roberta Glassman, Lianna Sarabekyan (multiple customers affected), Philip Poniz, Wells Fargo in Cape Coral FL, Wells Fargo Katy TX (many customers affected, blamed on road construction down the street), lots of individual stories where banks just totally stopped following their own procedures on ID checking and logging.
The vast majority of these don’t make the news because there’s no proof there was even anything inside the box in the first place so anyone could be lying.
> Mr. Pluard, who tracks legal filings and news reports, estimates that around 33,000 boxes a year are harmed by accidents, natural disasters and thefts.
> Oddly, the bank returned to him five watches that weren’t his. “They were the wrong color, the wrong size — totally different than what I had,” Mr. Poniz said. “I had no idea where they came from.”
> Regular branch banks have stuff go missing from the safety deposit boxes shockingly regularly. The locks aren’t particularly secure and various people are able to access them.
My late wife had a safe deposit box in the Almaden Valley (San Jose) branch of US Bank. Her key to the box was nowhere to be found. So I had to get the box drilled open.
This would normally require a hefty fee. But the branch was moving to a new location, so they invited customers to make an appointment to show up a Saturday with proper ID for a lock drilling party.
I showed my ID and the death certificate, and we went into the safe to have the lock drilled.
But there was no real drilling involved. The locksmith had a little handheld gadget that she pushed into the lock, gave it a little twist, and the door came right open.
The ironic part? All that was in there were a few pieces of costume jewelry, worth maybe $50 in total.
She was paying more than that per year for the box rental, and if I'd had to pay for the "drilling" it would probably be more than that.
I was with my mother when she went to close her safe deposit box. Her key did not work, so after checking her ID (could be fake), they used a tool that very quickly removed the lock. We were then left alone in the camera-less room with all of the other boxes and the tool...
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