Ciro Santilli controls the following accounts.
With non-trivial activity:
- github.com/cirosantilli on GitHub
- stackoverflow.com/users/895245 on Stack Overflow
- www.linkedin.com/in/cirosantilli on LinkedIn
- www.youtube.com/c/CiroSantilli on YouTube
- Twitter: see Section "Ciro Santilli's Twitter accounts"
- archive.org/details/@cirosantilli2 on the Internet Archive. Was archive.org/details/@cirosantilli but got deleted due to an "admin error" and the old username cannot be restored![ref]
- en.wikipedia.org/wiki/User:Cirosantilli2 and commons.wikimedia.org/wiki/User:Cirosantilli2: Ciro tries to upload all educational CC content he creates to Wikimedia Commons as an extra backup and sometimes to use in Wikipedia pages
- www.facebook.com/cirosantilli/ Ciro accepts all friend requests there, but expect a few non-technical posts. Unless you look like a massive honeypot account, please send context in advance in that case.
- www.quora.com/profile/Ciro-Santilli
- www.reddit.com/user/cirosantilli/ is Ciro's Reddit account, mostly computer and China topics
- maps.app.goo.gl/npV35XTppSBTmNqC8: Google Maps. Ciro Santilli likes to make additions to certain niche topics that are missing, having reached Local Guide Level 6 as of 2024. He can't do as much as he'd like so as to not reveal his current city however.
Trivial activity only:
- seqanswers.com/forums/member.php?u=90053
- answers.gazebosim.org/users/2289/cirosantilli/
- 4programmers.net/Profile/86786
- 500px.com/p/cirosantilli
- 9gag.com/u/cirosantilli
- addons.mozilla.org/en-US/firefox/user/cirosantilli/
- agoradesk.com/user/cirosantilli
- androidforums.com/members/ciro-santilli.1918307
- app.element.io/#/user/@cirosantilli:matrix.org. Proof: matrix.to/#/!OisxJPszSYdWdwXrrL:matrix.org/$YbrChbGFvlgYiDM5E2OgWXSp0vy7ayLfGkCXftAUyTI?via=matrix.org
- archive.org/details/@ciro_santilli_ourbigbook created during the account deletion mess.
- ask.libreoffice.org/en/users/2352/cirosantilli/
- bbs.archlinux.org/profile.php?id=116270
- bitcointalk.org/index.php?action=profile
- brilliant.org/profile/ciro-il1uxz/
- bugzilla.gnome.org/page.cgi?id=describeuser.html&login=ciro.santilli@gmail.com
- cirosantilli.blogspot.com/
- cirosantilli.itch.io
- cirosantilli.livejournal.com/profile
- cirosantilli.medium.com/ on Medium
- cirosantilli.substack.com/
- cirosantilli.wordpress.com/ on WordPress
- codeforces.com/profile/cirosantilli reverse proof codeforces.com/blog/entry/98393
- coderwall.com/Ciro%20Santilli Note that space on the username. Beauty.
- community.arm.com/people/cirosantilli
- community.atlassian.com/t5/user/viewprofilepage/user-id/680821
- community.fandom.com/wiki/User:Cirosantilli
- community.plos.org/people/cirosantilli
- community.skype.com/t5/user/viewprofilepage/user-id/2646858
- community.zimbra.com/members/cirosantilli
- connect.mozilla.org/t5/user/viewprofilepage/user-id/46889
- del.icio.us/cirosantilli
- dev.to/cirosantilli
- developer.mbed.org/users/cirosantilli/
- devtalk.nvidia.com/member/2118846/
- droit-finances.commentcamarche.net/profile/user/cirosantilli
- en.gravatar.com/cirosantilli
- en.wikipedia.org/wiki/User:Ciro.santilli also belongs to Ciro, but he lost the password
- eternagame.org/web/player/260828/
- figshare.com/authors/Ciro_Santilli/656781
- forums.developer.nvidia.com/u/cirosantilli
- forum.osdev.org/memberlist.php?mode=viewprofile&u=16372
- forum.pine64.org/member.php?action=profile&uid=17386
- forum.videolan.org/memberlist.php?mode=viewprofile&u=173503
- forum.xda-developers.com/member.php?u=7116837
- forums.androidcentral.com/members/cirosantilli-2734491
- forums.lenovo.com/user/viewprofilepage/user-id/1561639
- framasphere.org/people/78a975c0b6c40133a3032a0000053625 framasphere.org/posts/1519871
- freesound.org/people/cirosantilli
- gitlab.com/u/cirosantilli
- hackaday.io/cirosantilli
- hinative.com/en-US/profiles/5276462
- home.gamer.com.tw/homeindex.php?owner=cirosantilli but can't post anything publicly because cannot verify phone in many countries
- huggingface.co/cirosantilli
- identity.kde.org/index.php?r=people/view&uid=cirosantilli
- imgur.com/user/cirosantilli/about: Proof: imgur.com/gallery/mexv1Bk/comment/1734086983
- jsfiddle.net/user/cirosantilli/
- kiwifarms.net/members/cirosantilli.82011/
- launchpad.net/~cirosantilli
- leanpub.com/u/cirosantilli
- leetcode.com/cirosantilli/
- makandracards.com/ciro-santilli
- mastodon.social/@cirosantilli
- nanohub.org/members/146301/
- next-episode.net/user/cirosantilli/
- openclipart.org/artist/cirosantilli. TODO but not yet able to login after the "first upload". But it did get uploaded: openclipart.org/artist/cirosantilli.
- opencollective.com/ciro-santilli
- open.spotify.com/user/cirosantilli
- orcid.org/0000-0003-2895-7763
- parler.com/profile/cirosantilli/posts
- paypal.me/cirosantilli. United Kingdom account.
- peerj.com/cirosantilli/
- profile.edx.org/u/ciro_santilli
- profiles.3dgames.com.ar/profiles/1002278
- protonmail.uservoice.com/users/6491333990-ciro-santilli
- pypi.org/user/cirosantilli/
- raidforums.com/User-cirosantilli
- rubygems.org/profiles/cirosantilli
- software.intel.com/en-us/user/1090688
- soundcloud.com/cirosantilli
- sourceforge.net/u/cirosantilli/profile/
- stackshare.io/cirosantilli
- steamcommunity.com/id/cirosantilli/
- subreply.com/cirosantilli
- support.discord.com/hc/en-us/profiles/427813342894 on the Discord forum
- support.mozilla.org/en-US/user/cirosantilli
- tabmixplus.org/forum/memberlist.php?mode=viewprofile&u=59846
- talk.commonmark.org/users/cirosantilli
- talk.jekyllrb.com/users/cirosantilli
- talks.cam.ac.uk/user/show/81142
- tatoeba.org/eng/user/profile/cirosantilli
- telegram.me/cirosantilli on Telegram
- trac.ffmpeg.org/wiki/Waveform?action=history username
cirosantilli
- tuleap.net/users/cirosantilli
- tuleap.ring.cx/users/cirosantilli
- twittercommunity.com/users/cirosantilli/activity
- wefunder.com/cirosantilli
- wise.com/pay/me/cirod3. The name shows as "Ciro Duran Santilli" and that's correct.
- wiki.qemu.org/User:Cirosantilli
- www.airbnb.com/users/show/45794827
- www.behance.net/cirosantilli
- www.bibsonomy.org/user/cirosantilli
- www.biostars.org/u/50170/
- www.bountysource.com/people/25676-ciro-santilli
- www.bulletphysics.org/Bullet/phpBB3/memberlist.php?mode=viewprofile&u=11704
- www.codewars.com/users/cirosantilli
- www.codingame.com/profile/cddd0a711c22d97e8264361f7c8205567563841
- www.coursera.org/user/f65b08c191d792eb809fe2808d771ee7
- www.dailymotion.com/cirosantilli
- www.deviantart.com/cirosantilli
- www.digitalocean.com/community/users/cirosantilli
- www.ebay.com/usr/cirosantilli
- www.edaboard.com/member587087.html
- www.flickr.com/people/cirosantilli/
- www.freecodecamp.org/fcc8f660b91-167c-4b04-a8da-5d50cdb46def
- www.f6s.com/cirosantilli
- www.f6s.com/cirosantilli1
- www.gitbook.com/@cirosantilli
- www.hackerrank.com/cirosantilli
- www.hackster.io/cirosantilli
- www.html5gamedevs.com/profile/30103-cirosantilli/
- www.imdb.com/user/ur59802249 on IMDb
- www.instagram.com/cirosantilli/ Impossible to disable their notifications without removing your email. So all their notifications go to trash.
- www.kaggle.com/cirosantilli
- www.lesswrong.com/users/ciro-santilli on LessWrong
- www.linux.org/members/ciro-santilli.62540/
- www.linuxquestions.org/questions/user/cirosantilli-688439/
- www.meetup.com/members/252568305/
- www.mentebinaria.com.br/profile/1987-ciro-santilli/
- www.metacritic.com/user/cirosantilli
- www.metaculus.com/accounts/profile/163587/
- www.mohu.rocks/people/cirosantilli
- www.mudhut.com/user/1995000
- www.myopportunity.com/en/profile/ciro-santilli
- www.npmjs.com/~cirosantilli
- www.opengl.org/discussion_boards/member.php/40269-cirosantilli
- www.openstreetmap.org/user/Ciro%20Santilli
- www.patreon.com/cirosantilli
- www.physicsforums.com/members/cirosantilli.422056/
- www.pixiv.net/en/users/64347194
- www.plurk.com/cirosantilli
- www.raspberrypi.org/forums/memberlist.php?mode=viewprofile&u=273389
- www.shadertoy.com/user/cirosantilli
- www.strava.com/athletes/47913768
- www.tastekid.com/ciro.santilli
- www.ted.com/profiles/5822760
- www.thestudentroom.co.uk/member.php?u=5930160
- www.tiktok.com/@cirosantilli2
- www.transifex.com/user/profile/cirosantilli
- www.tripadvisor.com/members/cirosantilli
- www.twitch.tv/cirosantilli
- www.whatdotheyknow.com/user/ciro_santilli/profile
Profiles without URLs (OMG...):
- Discord: username
cirosantilli
, previouslycirosantilli#8921
Accounts in Chinese websites. These accounts might be banned or altered or offer other limitations, so Ciro only communicates briefly through them. All communication through those channels should obviously be assumed to be compromised:
- bbs.nibaedu.com/index.php?m=space&uid=70
- www.renren.com/338003848/profile
- www.tianya.cn/109285544 (can't post, no cell phone)
- hacpai.com/member/cirosantilli unable to login as of 2019-10-12, reason unclear, either ban or website too crappy.
- pincong.rocks/people/cirosantilli Lost account tested as of 2022-11 and likely much earlier. Last existing password not working, and there doesn't seem to be a reset password button. Creating cirosantilli2
- pincong.rocks/people/cirosantilli2
- tieba.baidu.com/home/main?id=5cd56369726f73616e74696c6c69c944
- v2ex.com/member/cirosantilli: Ciro was blocked and or account deleted on 2020-07-23: cirosantilli.com/china-dictatorship/v2ex
- v2ex.com/member/cirosantilli2: was created by someone else most likely and cannot be re-registered. Also blocked.
- v2ex.com/member/cirosantilli3: Ciro created this new account November 2023, let's see how long it lasts.
- www.zhihu.com/people/cirosantilli. Ciro was prevented from posting in 2018-06-25, and the account and all content mentioning him were taken down in 2019-11-03.
- www.weibo.com/p/1005055601627311: started requiring a cell phone to login in 2020, and Ciro didn't want to give his cell phone number to the CCP and didn't have the patience to manage a secondary phone number, so he is not logging in for now. The account was blocked in 2021: cirosantilli.com/china-dictatorship/ciro-santillis-weibo-block
Accounts in Russian websites:
Dead websites:
- www.citeulike.org/user/cirosantilli (2019-05)
citizenlab.ca/2022/09/statement-on-the-fatal-flaws-found-in-a-defunct-cia-covert-communications-system/ did an investigation and found 885 such websites, but decided not to disclose the list or methods:The question is which website. E.g. at citizenlab.ca/2021/07/hooking-candiru-another-mercenary-spyware-vendor-comes-into-focus/ they used data from Censys.
Using only a single website, as well as publicly available material such as historical internet scanning results and the Internet Archive's Wayback Machine, we identified a network of 885 websites and have high confidence that the United States (US) Central Intelligence Agency (CIA) used these sites for covert communication.The websites included similar Java, JavaScript, Adobe Flash, and CGI artifacts that implemented or apparently loaded covert communications apps. In addition, blocks of sequential IP addresses registered to apparently fictitious US companies were used to host some of the websites. All of these flaws would have facilitated discovery by hostile parties.The websites, which purported to be news, weather, sports, healthcare, and other legitimate websites, appeared to be localized to at least 29 languages and geared towards at least 36 countries.
We searched historical data from Censyscitizenlab.ca/2016/08/million-dollar-dissident-iphone-zero-day-nso-group-uae/ mentions scans.io/. citizenlab.ca/2020/12/running-in-circles-uncovering-the-clients-of-cyberespionage-firm-circles/ mentions: www.shodan.io/, Censys really seems to be their thing.
Another critical excerpt is:This basically implies that they must have found some communication layer level identifier, e.g. IP registration, domain name registration, or certificate because it is impossible to believe that real agent names would have been present on the website content itself!
The bulk of the websites that we discovered were active at various periods between 2004 and 2013. We do not believe that the CIA has recently used this communications infrastructure. Nevertheless, a subset of the websites are linked to individuals who may be former and possibly still active intelligence community employees or assets:Given that we cannot rule out ongoing risks to CIA employees or assets, we are not publishing full technical details regarding our process of mapping out the network at this time. As a first step, we intend to conduct a limited disclosure to US Government oversight bodies.
- Several are currently abroad
- Another left mainland China in the time frame of the Chinese crackdown
- Another was subsequently employed by the US State Department
- Another now works at a foreign intelligence contractor
The websites were used from at least as early as August 2008, as per Gholamreza Hosseini's account, and the system was only shutdown in 2013 apparently. citizenlab.ca/2022/09/statement-on-the-fatal-flaws-found-in-a-defunct-cia-covert-communications-system/ however claims that they were used since as early as 2004.
Notably, so as to be less suspicious the websites are often in the language of the country for which they were intended, so we can often guess which country they were intended for!
6th edition (1956) on the Internet Archive: archive.org/details/discoveryoftheel002045mbp
Biography of Enrico Fermi by fellow physicist, free rent on the on the Internet Archive: archive.org/details/enricofermiphysi0000segr
Previously called "Lending Library" it seems: help.archive.org/hc/en-us/articles/360016554912-Borrowing-From-The-Lending-Library
You can borrow online books from them for a few hours/days: help.archive.org/hc/en-us/articles/360016554912-Borrowing-From-The-Lending-Library This is the most amazing thing ever made!!! You can even link to specific pages, e.g. archive.org/details/supermenstory00murr/page/80/mode/2up
They seem to a have a separate URL with the same content as well for some reason: openlibrary.org/, classic messy Internet Archive style.
Bastards are suing them www.theverge.com/2020/6/1/21277036/internet-archive-publishers-lawsuit-open-library-ebook-lending: Hachette, Penguin Random House, Wiley, and HarperCollins
It is quite hard to decide if an upload is from the official legal lending library, or just some illegal upload, e.g.:so the URLs are basically the same style. Some legality indicators:
- archive.org/details/TheGoogleStory likely illegal
- archive.org/details/isbn_9780385342728 likely legal
Access-restricted-item
: true- present in the collection: archive.org/details/internetarchivebooks?tab=about
Free borrow on the Internet Archive: archive.org/details/inwardboundofmat0000pais/page/88/mode/2up
The book unfortunately does not cover the history of quantum mechanics very, the author specifically says that this will not be covered, the focus is more on particles/forces. But there are still some mentions.
Subtle is the Lord by Abraham Pais (1982) mentions that this has a good summary of the atomic theory evidence that was present at the time, and which had become basically indisputable at or soon after that date.
On Wikimedia Commons since it is now public domain in most countries: commons.wikimedia.org/w/index.php?title=File:Perrin,_Jean_-_Les_Atomes,_F%C3%A9lix_Alcan,_1913.djvu
An English translation from 1916 by English chemist Dalziel Llewellyn Hammick on the Internet Archive, also on the public domain: archive.org/details/atoms00hammgoog
Many subjects have changed very little in the last hundred years, and so it is mind-blowing that people have to pay for books that teach them!
If computers are bicycles for the mind, Ciro wants this website to be the Ferrari of the mind.
Since Ciro Santilli was young, he has been bewildered by the natural sciences and mathematics due to his bad memory.
The beauty of those subjects has always felt like intense sunlight in a fresh morning to Ciro. Sometimes it gets covered by clouds and obscured by less important things, but it always comes back again and again, weaker or stronger with its warmth, guiding Ciro's life path.
As a result, he has always suffered a lot at school: his grades were good, but he wasn't really learning those beautiful things that he wanted to learn!
School, instead of helping him, was just wasting his time with superficial knowledge.
First, before university, school organization had only one goal: put you into the best universities, to make a poster out of you and get publicity, so that more parents will be willing to pay them money to put their kids into good university.
Ciro once asked a chemistry teacher some "deeper question" after course was over, related to the superficial vision of the topic they were learning to get grades in university entry exams. The teacher replied something like:Ciro feels that this was one of the greatest compliments he has ever received in his life. This teacher, understood him. Funny how some things stick, while all the rest fades.
You remind me of a friend of mine. He always wanted to understand the deeper reason for things. He now works at NASA.
Another interesting anecdote is how Ciro Santilli's mother recalls that she always found out about exams in the same way: when the phone started ringing as Ciro's friends started asking for help with the subjects just before the exam. Sometimes it was already too hopelessly late, but Ciro almost always tried. Nothing shows how much better you are than someone than teaching them.
Then, after entering university, although things got way better because were are able to learn things that are borderline useful.
Ciro still felt a strong emotion of nostalgia when after university his mother asked if she could throw away his high school books, and Ciro started tearing them all down for recycling. Such is life.
University teachers were still to a large extent researchers who didn't want to, know how to and above all have enough time and institutional freedom to teach things properly and make you see their beauty, some good relate articles:
The very fact that you had very little choice of what to learn so that a large group can get a "Diploma", makes it impossible for people to deeply learn what the really want.
This is especially true because Ciro was in Brazil, a third world country, where the opportunities are comparatively extremely limited to the first world.
Also extremely frustrating is how you might have to wait for years to get to the subject you really want. For example, on a physics course, quantum mechanics is normally only taught on the third year! While there is value to knowing the pre-requisites, holding people back for years is just too sad, and Ciro much prefers backward design. And just like the university entry exams, this creates an entry barrier situation where you might in the end find that "hey, that's not what I wanted to learn after all", see also: students must have a flexible choice of what to learn.
We've created a system where people just wait, and wait, and wait, never really doing what they really want. They wait through school to get into university. They wait through university to get to masters. They wait through masters to get to PhD. They wait through PhD to become a PI. And for the minuscule fraction of those that make it, they become fund proposal writers. And if you make any wrong choice along the, it's all over, you can't continue anymore, the cost would be too great. So you just become software engineer or a consultant. Is this the society that we really want?
And all of this is considering that he was very lucky to not be in a poor family, and was already in some of the best educational institutions locally available already, and had comparatively awesome teachers, without which he wouldn't be where he is today if he hadn't had such advantages in the first place.
But no matter how awesome one teacher is, no single person can overcome a system so large and broken. Without technological innovation that is.
The key problem all along the way is the Society's/Government's belief that everyone has to learn the same things, and that grades in exams mean anything.
Ciro believes however, that exams are useless, and that there are only two meaningful metrics:
- how much money you make
- fame for doing for doing useful work for society without earning money, which notably includes creating new or better free knowledge such as in academic papers, either novel or review
Even if you wanted to really learn natural sciences and had the time available, it is just too hard to find good resources to properly learn it. Even attending university courses are hit and miss between amazing and mediocre teachers.
If you go into a large book shop, the science section is tiny, and useless popular science books dominate it without precise experiment descriptions. And then, the only few "serious" books are a huge list of formulas without any experimental motivation.
And if you are lucky to have access to an university library that has open doors, most books are likely to be old and boring as well. Googling for PDFs from university courses is the best bet.
Around 2012 however, he finally saw the light, and started his path to Ciro Santilli's Open Source Enlightenment. University was not needed anymore. He could learn whatever he wanted. A vision was born.
To make things worse, for a long time he was tired of seeing poor people begging on the streets every day and not doing anything about it. He thought:which like everything else is likely derived subconsciously from something else, here Schindler's list possibly adapted quote from the Talmud:
He who teaches one thousand, saves one million.
He who saves the life of one man saves the entire world.
So, by the time he left University, instead of pursuing a PhD in theoretical Mathematics or Physics just for the beauty of it as he had once considered, he had new plans.
We needed a new educational system. One that would allow people to fulfill their potential and desires, and truly improve society as a result, both in rich and poor countries.
And he found out that programming and applied mathematics could also be fun, so he might as well have some fun while doing this! ;-)
So he started Booktree in 2014, a GitLab fork, worked on it for an year, noticed the approach was dumb, and a few years later started building this new version. The repo github.com/booktree/booktree is a small snapshot of Ciro's 2014 brain on the area, there were quite a few similar projects at the time, and most have died.
Ciro is basically a librarian at heart, and wants to be the next:
- Jimmy Wales
- Brewster Kahle
- Tim Berners Lee
- Tim O'Reilly, who once brilliantly described O'Reilly Media as "a lifestyle business that got out of control" [ref]
- Aaron Swartz. Minus suicide hopefully.
QED and the men who made it: Dyson, Feynman, Schwinger, and Tomonaga by Silvan Schweber (1994) Updated 2024-12-15 +Created 1970-01-01
Available for free online rent on the Internet Archive: archive.org/details/qedmenwhomadeitd0000schw
This book has formulas on it, which is quite cool!! And the formulas are basically not understandable unless you know the subject pretty well already in advance. It is however possible to skip over them and get back to the little personal stories.
This paper appears to calculate the Schrödinger equation solution for the hydrogen atom.
TODO is this the original paper on the Schrödinger equation?
Published on Annalen der Physik in 1926.
Open access in German at: onlinelibrary.wiley.com/doi/10.1002/andp.19263840404 which gives volume 384, Issue 4, Pages 361-376. Kudos to Wiley for that. E.g. Nature did not have similar policies as of 2023.
This paper may have fallen into the public domain in the US in 2022! On the Internet Archive we can see scans of the journal that contains it at: ia903403.us.archive.org/29/items/sim_annalen-der-physik_1926_79_contents/sim_annalen-der-physik_1926_79_contents.pdf. Ciro Santilli extracted just the paper to: commons.wikimedia.org/w/index.php?title=File%3AQuantisierung_als_Eigenwertproblem.pdf. It is not as well processed as the Wiley one, but it is of 100% guaranteed clean public domain provenance! TODO: hmmm, it may be public domain in the USA but not Germany, where 70 years after author deaths rules, and Schrodinger died in 1961, so it may be up to 2031 in that country... messy stuff. There's also the question of wether copyright is was tranferred to AdP at publication or not.
An early English translation present at Collected Papers On Wave Mechanics by Deans (1928).
Contains formulas such as the Schrödinger equation solution for the hydrogen atom (1''):where:
In order for there to be numerical agreement, must have the value
, are the charge and mass of the electron
Robert Noyce: The Man Behind the Microchip by Leslie Berlin (2006) Updated 2024-12-15 +Created 1970-01-01
Borrow from the Internet Archive for free: archive.org/details/manbehindmicroc000berl/page/n445/mode/2up
The Supermen: The Story of Seymour Cray by Charles J. Murray (1997) Updated 2024-12-15 +Created 1970-01-01
Borrow from the Internet Archive for free: archive.org/details/supermenstory00murr
Initial chapters put good clarity on the formation of the military-industrial complex. Being backed by the military, especially just after World War II, was in itself enough credibility to start and foster a company.
It is funny to see how the first computers were very artisanal, made on a one-off basis.
Amazing how Control Data Corporation raised capital IPO style as a startup without a product. The dude was selling shares at dinner parties in his home.
Very interesting mention on page 70 of how Israel bought CDC's UNIVAC 1103 which Cray contributed greatly to design, and everyone knew that it was to make thermonuclear weapons, since that was what the big American labs like this mention should be added to: en.wikipedia.org/wiki/Nuclear_weapons_and_Israel but that's Extended Protected... the horrors of Wikipedia.
Another interesting insight is how "unintegrated" computers were back then. They were literally building computers out of individual vacuum tubes, then individual semiconducting transistors, a gate at a time. Then things got more and more integrated as time went. That is why the now outdated word "microprocessor" existed. When processors start to fit into a single integrated circuit, they were truly micro compared to the monstrosities that existed previously.
Also, because integration was so weak initially, it was important to more manually consider the length of wire signals had to travel, and try to put components closer together to reduce the critical path to be able to increase clock speeds. These constraints are also of course present in modern computer design, but they were just so much more visible in those days.
The book does unfortunately not give much detail in Crays personal life as mentioned on this book review: www.goodreads.com/review/show/1277733185?book_show_action=true. His childhood section is brief, and his wedding is described in one paragraph, and divorce in one sentence. Part of this is because he was very private about his family most likely note how Wikipedia had missed his first wedding, and likely misattribute children to the second wedding; en.wikipedia.org/wiki/Talk:Seymour_Cray section "Weddings and Children".
Crays work philosophy is is highlighted many times in the book, and it is something worthy to have in mind:
- if a design is not working, start from scratch
- don't be the very first pioneer of a technology, let others work out the problems for you first, and then come second and win
Cray's final downfall was when he opted to try to use a promising but hard to work with material gallium arsenide instead of silicon as his way to try and speed up computers, see also: gallium arsenide vs silicon. Also, he went against the extremely current of the late 80's early 90's pointing rather towards using massively parallel systems based on silicon off-the-shelf Intel processors, a current that had DARPA support, and which by far the path that won very dramatically as of 2020, see: Intel supercomputer market share.