Operating Systems: Crash Course Computer Science #18

[@billmeistera1992]

Thank you to the presenter. She did an amazing job of breaking down a technical topic into a fun and interesting one in a very effective short time.

[@Flowtail]

Yep, as she does every episode ^ω^

[@realFoxBox]

11:18 where IT began "Have you tried turning it off and on again?"

[@psun256]

retrogamefox IT: 50% google the answer and other half is turn it on and off

[@EdwardCree]

As a Linux kernel developer, I watched the whole video planning to point out all the mistakes and errors. Frustratingly, there weren't any. Well done +CrashCourse, you've ruined my fun ;)

[@sauronvile4169]

Except that the operating system ISN'T the first thing to start when you turn on a computer.

[@lethalurethral3056]

@@sauronvile4169 She said typically didn't she

[@Kori114]

Who else had a brief moment of panic at 11:38 ? I will never forget the sound of old windows giving me a freaking error!

[@noxabellus]

bsod ptsd

[@madLphnt]

love that sound....Ski Free was awesome too

[@kyc269]

Kori114 That sound made my blood pressure spike.

[@ashboon1625]

I rarely see a bsod in windows 10 nowadays...

[@firebucket8203]

ash boon dun dun dun du dun dun

[@rayshardthompson1456]

Am I the only one who burst into laughter when she said "plug and pray" 😂😂

[@mf_01]

my teacher said plug and chug

[@madLphnt]

yeah ive heard plug n chug regarding physics equations before never plug n pray but they both sound good. plug and chug is better though

[@AthAthanasius]

In the early days of "Plug and Play" on PCs it didn't work all that well, so we did indeed call it "Plug and Pray".

[@f.j.n.9215]

A bit like that Australian cardinal did...

[@djbutterchicken]

Rayshard Thompson yes you were

[@janek8195]

I love this show! I've learned so much from it, especially the episodes explaining all the details of how transistors come together to make logic gates, and how those actually come together to make all the different basic parts of a cpu. I've known about logic gates and the way they work (their "rules") for a long time, but never found a video series explaining how they're applied in practice that was so easy to absorb and so well organized. Keep making more episodes plz :)

[@satyanweshi-bb]

CrashCourse, you have helped me with satisfying my curiosity for a large number of fields. Thanks for all this.

[@thesk8erdav]

computers are rocks we tricked to think

[@SbotTV]

I always like to say that computer science is essentially the art of tricking the universe into doing your homework.

[@oldcowbb]

we are meat that trick ourselves that we can think

[@edibleturd]

But we had to flatten them first so we could put lightning in them

[@RibbittIII]

Dav 1243 if a computer thinks than a submarine swims

[@limitless1692]

Hahahaha 😎

[@chrisseddon260]

Quote of the episode: "This was clearly terrible"

[@keistzenon9593]

Nice soundbyte :D the way she says it is kinda funny imagining it it of context

[@HugoCornellier]

Excellent presenter. I’ve specifically come back to her videos because she’s helped me during Uni!

[@shadowlove3626]

Currently starting the transition from clinical psychology to tech and I could not be more pleased with this channel and series! It was wonderful during grad school for psychology and now for technology as I look for programs, I already completed some work though Coursera but this really helps lay a foundation and fill in gaps of specific skills I am currently learning.

[@kerig6416]

These videos have taught me more than my college professors for the past 2 semesters. THANK YOU, and excellent work on these videos!

[@lantishaledane]

"Things weren't exactly PLUG-and-PLAY back then...more of PLUG-and-PRAY." :D :D :D

[@sjupi7941]

I studied computer science and was supposed to learn all of these at school but hated it back then. Because they didn't tell it like Carrie Anne.

[@geoffbarker7776]

As someone who has worked with mainframe tech produced in the 1960's and well used to a format loop on a printer you soon get to learn that everything is an evolution from something before it and thus long term you just see it as X with Y. The thing is that most people today would run a mile having to do what we used to have to do, bringing in paper to the print room by 3-4 boxes which was 190+ pounds in weight. Oh the stories of the good old days where throwing a write protect ring could down an entire place if it hit the emergency power off.

[@markh5101]

Omg! I haven't watched this yet but I'm already super excited for the Reboot reference on the title card!

[@Rtotalmagic]

Mark H Megabyte and Hexadecimal are cool villains, so it's fun to see them make an appearance...

[@jhgfd82]

Aww! You guys put in clips from Bits & Bytes! I loved that series! So happy to see it surface here in some way. Thank you!

[@austinmurphy9074]

3:40 "dont lie. you dont pronounce it shhhheduling.. 4:16 "got you"

[@austinmurphy9074]

update: I now pronounce it shhheduling

[@chrismissed]

Nice catch

[@dippy9119]

I am thoroughly enjoying the computer science crash course series. Great work Kerryanne and Crash Course.

[@congaspy2058]

"-blue screen of death-DUN" *heart attack*

[@mndplg]

Thank you Unix for being the granddaddy of Linux. We salute your efficiency, speed, and power.

[@SunOfNight]

Even after all these years since seeing it last, the blue screen sound at @11:39 is still familiar and dreaded.

[@morezco]

Might just be the most interesting Crash Course for me

[@revolutionaryprepper4076]

This is a very good explanation of how operating systems came about.

[@sixfr0nt]

Had to watch this for my high school computer science class. I’m not disappointed.

[@explorerars4208]

This video is not for teaching purpose as it can be only understand by the person who have very much depth knowledge about all the operating system

[@abdallahlakkis449]

The presenter is absolutely awesome at simplifying these concepts

[@verdatum]

"It's a UNIX system....I KNOW this!!"

[@SPRPhilly]

"It tells you everything."

[@jordantom1789]

"cleaver girl..."

[@JM-us3fr]

Stupid movies I've memorized every line to. Now I have to like your comment

[@edibleturd]

It WAS Unix, the program used was filesystem navigator.

[@aurorajarvis5502]

Incidentally, the computer she was using was the same kind of system they used to make all of the cgi for the movie. A Silicon Graphics system.

[@cholten99]

I vividly remember in 1994 when my flatmate bought a Commodore Amiga that could play music and print at the same time. We'd had UNIX (Solaris on Sparcs) at uni but seeing a home OS do that felt like a huge step forward.

[@aurathedraak7909]

As a programmer and learned computer science. I loved it every bit of it since I was a 14.

[@fredschwartz3654]

I'm surprised I didn't hear IBM's MFT, MVT, MVS, and VM mentioned. I've been retired for a while, but for the first half of my programming career, they were the only operating systems robust enough to run any large meaningful corporate applications.

[@Danielevans2]

"not quite plug and play but plug and pray" LOVE THAT. That's still true today WITH LIVE A/V +PA STUFF

[@overestimatedforesight]

It's amazing how much things make sense as solutions once someone has explained the problem.

[@muizzsiddique]

These days, if you have 2-8GB of memory and are running the latest version of Windows, you can also find that half of your memory has gone to your OS.

[@echaltraw]

Ok, I honestly clicked to watch the vid because of the Reboot chatacters on the screen card. Childhood nostalgia away!

[@recklessroges]

I'm surprised at how many people got the reference. I expected a much younger audience.

[@UnrealOG137]

"Half of a computer's memory just to run the OS" So, Windows Vista?

[@thdoom81]

you are a blessing..the sequential nature of your videos really helps

[@nohashtagshere4116]

I'm liking this just because there's megabyte and hexadecimal on this icon screen. That's enough reason for me

[@mehmetosman1366]

Noha

[@macbuff81]

Windows 10 still crashes constantly and when you least expect it. One of the reasons I now use Linux and MacOS (a Unix derivative itself). Windows 7 I did find visually appealing and was more stable than previous iterations, but nevertheless using Windows is as annoying as ever. Whenever you install a program, you always run the risk it will alter the OS so the next time you boot up, you get some error message. Oh, and it's especially vulnerable to viruses. Only recently did Microsoft provide basic antivirus as standard along with the OS. Embarrassing. Windows Vista and Windows 8 were prime example of half-baked underdeveloped versions of Windows that should have never been released.

[@countrykang8]

This is one of the best lectures I have seen on KZbin. Keep the info coming!!

[@paxdriver]

Yay! Abstraction elevator returns! Lol love the show, favorite on crash course so far

[@kurtlindner]

7:38 Re:Boot reference -I love you.

[@jackoftraes2122]

I'm glad that someone else noticed 😃

[@JayAyers]

I was like... is that Hexadecimal? It is!

[@KevShaw808]

This is a great video for anyone trying to learn more about operating systems.

[@varungopal6272]

I wonder no other person can explain better than her such a huge information in crisp and simple way though it does not give a deep insight it is very intuitive

[@Naz-pk4ll]

gosh, I wish there was such clarity for some of the mathematics areas. For example, stochastic processes.

[@AlexanderBarrow]

"Meaning you can stream a video in your webbrowser and edit a photo in PhotoShop". I had to pause the video and take that in, because that exactly what I was doing :D

[@JDr-di2qw]

thank you for present so nice course,love u guys,love u carrie anne ！

[@oslonorway547]

Oh the good ol' days, back when we had to load an iPhone onto a truck and transport 10MB across the country.

[@apefu]

Never underestimate the bandwidth of a truck hurdling down the road fully stocked with iPhones.

[@aggbak1]

Oslo MGTOW Ayy Mgtow

[@madLphnt]

The good ol' days juuuuust before Counter-Strike came out. mmmm the joy of playing what i knew at the time would be the most enjoyable game ever to be played again. still playing :) 1.6 too ppl cmon dont even ask.

[@kurtlindner]

Garbaz OMG! That is a number crunching orgasm right there.

[@Neojhun]

A form of IPoAC. With modern devices like SD Cards, still can be much better than crappy internet. en.wikipedia.org/wiki/IP_over_Avian_Carriers

[@vonneely1977]

Crash Course releases operating systems at the same time PBS releases quantum field theory. If you need me, I'll be watching The Matrix.

[@interdimensionalsailboat]

"Chillin, you know, not like a villian, but relaxing." I didn't need that, but thanks i guess 😂.

[@BrandonDoran00]

Im loving the animated Reboot characters!

[@ThatGuyNamedBender]

That reference to ReBoot at 7:36 xD

[@izznub]

Hey. I really like this series and just wanted to point out that the screen shown at 11m20s is not DOS but OS/400.

[@TooUnoriginal]

Thank you! Wanted to know what that was

[@carlos26ch]

This series is so good

[@andrewgalloway8012]

I spotted Hexadecimal from ReBoot!!! This is the best show on KZbin!!!!!!!!

[@eughenes95]

I think she should have mentioned that UNIX is still with us in the form of Linux and Android, it really makes you appreciate the age and amount of work that went into these things. (also BSD and Darwin :) ) To me its astonishing how even after all these years, even if the way we do computing has changed completely, Linux is still very much a multi-user system designed for main frames; you can see it everywhere from user management and the permission system, to the way tasks are handled, the filesystem and the presence of TTYs. The core principles of UNIX are still very much present. Personally i find amazing how stratified, complex and messy Linux is: it never really changed from that original design, it only grew is size and functionality: you can pick up a UNIX manual from the 1980s and find that 90% of the information in there still works with some very minor changes, it blows my mind :D

[@wumbology8421]

The only modern UNIX-certified operating system is macOS. Linux-based systems and Android are merely UNIX-like.

[@eughenes95]

i assume you mean its derived from AT&T UNIX? I was fairly sure Darwin was based on BSD... anyway i meant it more as 'the legacy of UNIX' rather than a strict successor. besides i was talking in terms of fuctionality and philosophy :)

[@noahw4623]

It's because of Linux tries to follow POSIX when possible.

[@harikirankante3391]

This playlist is the reason why I took Computer science in my bachelor's degree ❤️

[@ajholanda]

Congrats! Very crystal clear and concise!

[@Yahriel]

@3:37 REBOOT REFERENCE I LOVE YOU

[@JasmineOlivarez]

As a cybersecurity student, I love her shirts lol. My professor linked me to this video for an assignment and it was really good, I learned a lot in such a short amount of time. Thank you!

[@ghostface5559]

Does PBS just do everything cool now? glad I live in Indiana then.

[@khendron]

I spotted Billy Van from Bits and Bytes!! The first show about computers I ever watched!

[@SparrowFae]

A++ Reboot reference. Much approved.

[@adamstrejcovsky8257]

this channel is simply amazing. i was looking long time for some quick explanation of what filesystem is without goign too much into detail, but all i found is comparisons which are better but not what FS actually is. and then there is this cool channel

[@katethemikufan9109]

Hi. I'm studying games Development and this video is really helpful. Thank you...

[@juanpablodenis3748]

saw many video trying to grasp the concept of kernel, now I can say done.

[@lot_us_begin]

Such a charming person, thank you so much, it was easy to understand and pleasant to listen to and watch ^^

[@deldrinov]

Unix is one true operating system and Linux is one of its kernels. Stallman is great! Stallman is great!

[@BosonCollider]

No, Unix was terrible compared to many of its contemporaries as far as features & productivity go. It just happened to run on cheap hardware. Perfect for universities and government run organization, where securing funding for equipment is much harder than securing funding for employee man hours, even if the latter ends up costing more in the long run.

[@LuficariusRatspeed]

GNU, not Unix. :P

[@cipher315198]

Stallman was not involved in Unix. He is on the recorded as saying it is awful as it is not open source. pro tip: never go full Stallman.

[@LuficariusRatspeed]

What do you mean "full Stallman?" You're basically saying don't use GNU/GPL.

[@cipher315198]

Stallman is a excellent example of taking a good idea way to far. Stallman says you should only use software that is 100% open. So for example he will not listen to mp3's (mp3 is not a open format). he thinks both ios and android are bad and should not be used. He is absolutely militant about this sort of thing. Going so far as to say that you using Skype is morally wrong because by doing so you are pressuring others to use it to talk with you, and this strips them of their freedom. He is huge in software development and open source, but people have a tendency to over look the radical honestly nonsensical parts of his dogma. The TL;DR is ya he did a lot of important stuff, but he is not some infallible savor figure.

[@dlbattle100]

These days Windows is almost as good as Unix was in 1969 :P.

[@zenchiassassin283]

XD

[@h3ct0rjs]

As a professional engineer with extensive knowledge on os and networks I do reall enjoyed this video.thank you

[@typograf62]

The printer at 5:43 displays a carriage tape. It did control form feed, top of form and feed to a predefined position (channel). Oh, those days. I wrote a printer driver in assembler to a really no-brain printer. It had no buffer, so I had to time each character calculating the time needed to change position and feed paper. As a bonus I added a tabulator function. The printer was a desktop model. It weighed 50 kg or more. My bicycle broke down when I moved this thing home on it.

[@blakeingram1711]

This is helping a lot with my app computer science principles class

[@gustavskavacs9991]

This was actually very informative! Thank you! Great, I finally understand what a kernel is.

[@magnusnordlund3787]

Best summary of operating system fundamentals I ever heard! Thanks!

[@DrahcirII]

Unix is still alive in spirit! Can I get a WHOOP WHOOP for the Linux fans out there?

[@TheLukeSchnabel]

This is awesome! Im hooked!

[@simonzenn]

Love the ReBoot reference

[@ddssi]

Amazing lesson.😍 Who agrees with me?

[@FitzRave]

Wow I finally understand the true purpose of virtual memory

[@EnragedSephiroth]

Megabyte and Hexadecimal from Reboot... I love it

[@crazyconan28]

Your videos are awesome! Thank you crashcourse!!!

[@TheLanCave]

I don't know why I get so excited about the Wilhelm scream, but I do...

[@wthrwyz]

Okay at 11:20 she's talking about DOS running on PCs...but they show a Twinax terminal with an AS/400 sign-on screen. These things have nothing to do with each other!

[@kieranhosty]

The idea of separating the kernel from the libraries explains so much of why Linux is weird today. A programmer's paradise, but an unstandardised, disorganised brush of UX

[@kfqfguoqf]

Excellent video, very interesting to see each OS feature coming up as a natural solution to a problem people had!

[@theCTCamp]

Fantastic Reboot reference!

[@lilybohr]

Watching this for my operating systems class.

[@GX1XD1PD]

shed-yuling add that to the long list of disagreements in pronunciation with the British dialect

[@ba8e]

Muh 'Murica

[@banderi002]

If this case is anything to represent BE, then clearly AE is the actual language. For the love of everything, PLEASE do NOT pronounce it that way. It made my ears *BLEED*.

[@BrettPyke]

Up until recently, the only exposure they would have had to someone with a British accent was a merchant at the ports. Audio recordings/broadcasts have only been around since the 20th century. The majority of the US would not have known that the English pronunciations were changing back then.

[@madLphnt]

and the the French took Zeta from Greek, then changed it to zede and then the English changed it to zed and we Americans changed it to Zee, easiest to pronounce. brits stole from french who stole from Greece, We just made it easier to pronounce

[@Kabodanki]

skedooling

[@MakeMeThinkAgain]

2:20 Reminds me of when we used Macs to control videodisc players around 1990 and you had to study the manual for each device to know what you could do and how. I need to go lie down now.

[@malikrahman8649]

I love this series!!

[@the_mtb_engineer]

Taught me exactly what Kernel means. Thank you!

[@MotionMarks]

Seriously this is the hardest subiect that CrashCourse ever put their hands on and I just wonder whose briliant crack idea it was to have that knowledge given at pentium i7 speed.

[@springmemory6637]

Great video! I was wondering about all these different types of operating systems that exist and used to, this video was a delight to watch :)

[@Techvideos-q7u]

Thank you so much for this masterpiece 🙏

[@DaisFlaque]

Technically... Windows started in '84... But the rest was quite accurate. What a breath of fresh air. Very nice video.

[@realcygnus]

the evolution of technology is just as interesting as the technology itself

[@greatwavefan397]

What makes an OS perform well or faster?

[@fredericktiku2585]

Currently starting a course on operating system.This video was really helpful.

[@dimitarvel1441]

actually in C++ you can read the memory location of a variable and even allocate memory using the new operator

[@MercedLCARS]

Oh yeah I forgot about that, use the & operator to retrieve the memory address...man this is going way back. - a trip to memory lane :)

[@fullanalysis93]

In C you can try it yourself and break everything with malloc

[@ryanpeavler5993]

This is an excellent series with a distinguished instructor. In association with PBS? I think this would be an excellent program for PBS kids. Kids today do not know a world without technology. Both of our futures could be improved if children had access to the knowledge of computers and technology.