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How A CPU (Central Processing Unit) Works !

Hi, we'll be discussing classical computing, more specifically - how the CPU operates and CPU parallelism. [Music] In the previous video in this series we discussed the shrinking of the transistor, allowing for more powerful and efficient computers, as well as the end of Moore's Law based on the miniaturization of the transistor within the next seven to ten years. Be sure to check it out for some background context for this video. Now in that video when referring to computing performance, we were focused on classical computing based on the CPU.

Classical computing, is essentially the digital computer, almost every computing device on the market today is a classical computer. Classical computers operate in serial, in other words, as mentioned in the first video in the series, Computing Origins, executing various instructions extremely fast in 'order', but to the average user it appears to be running them in parallel, meaning multiple instructions at a time. This is du…

10 Cool Chrome Extensions You Must Know

Hey, what's up guys, I'm Bhawi, and todayI've got a bunch of really cool chrome extensions that I'm pretty sure you've never heard of, because this list is made up of extensions that all have less than 1000 ratings on the Chrome Web Store. So it's not like these will be the cliche ones you always hear about. And in the end, if you're interested, I'll put a link to another post with even more extensions from before. But anyway I guess let's get started.

Tool No. 1

First up, this one I know is going to really come in handy, it's called "Printliminator". This is for all those times you went to printout a webpage, but it ends up looking terrible because so many things on the site clutter it up, or mess up the formatting. With this, it lets you simply click on different assets on the site, and removes them, so they won't be there when you go to print. This is also useful if you want to take a screenshot of a website and want to remove annoying stuff like all the social media icon links or want to remove sensitive information before printing or screenshotting as well. Lots of awesome uses here.

Tool No. 2

Next up, number two is called Rescroller, which lets you customize the scroll bar for Chrome. This could be good for both visual and practical reasons as well that I can talk about. It works pretty simply, you just go to the extension, then choose different options for how it looks, like width, color, the fill of the scroll bar, if it should have rounded corners, and even if you want it to change when you hover over it. But besides that, I think this extension should be helpful to anyone who has a really high-resolution monitor. For example, maybe you have a 4K monitor, so the scroll bar seems smaller compared to the rest of the screen. With this extension, you can just adjust the scrollbar size, so it's bigger and easier to click on with bigger screens. Or maybe even the opposite, where you're on a small screen, and you want the scroll bar to be smaller, who knows. I'm sure you can think of other ways to use it.

Tool No. 3

Alright, number 3 is a pretty cool one. It's called "Fontface Ninja", and it simply tells you what different fonts are being used on any website. But not only that, it will give you links to where you can download that font to use yourself, whether it's a free font or one you'd have to buy. How it works is you click on the icon for the extension to activate it, and the first thing you'll see is the entire list of fonts on the site. But the cooler thing is you can hover over any text on the site, and it will show a little pop up saying what font that specific text is using. Plus it will tell you everything from the current font size, the vertical and horizontal spacing, and even the font color. Here's another neat thing, if you click on the font in the list, it will open up a text box so you can try out the font, and resize it to see how it looks, and then there's a link to a site where you can buy that font if you want. So if you've ever wondered how a certain site got their text to look that way, now you'll know.

Tool No. 4

Number 4, this is actually a pretty well-known service, but I don't think many people realize there's an extension. And that is Wolfram Alpha. If you're not familiar, Wolfram Alpha is a site that is basically, the ultimate calculator. Not only can it do pretty much any mathematical calculation ever, but you can also ask it information about almost anything. This includes information about chemistry, music, physics, geography, sports, computer science, history, yea pretty much everything. So for example, you can type in "Apple Nutrition" and it will give you everything you've ever wanted to know about apples. Or even you could do something like, "Sunspath New York", and it will literally tell you where the sun will be at what time. Or something simple like, "How long until new years". Again, there are just so many things its capable of, there's no way I could even begin to go through them all, so you can just use the extension to search for anything that comes to mind, and it can probably tell you more.

Tool No. 5

Ok, number 5 is dead simple but so useful. It's called "New Tab Draft", and it just turns any new tab you open into a blank notepad basically. This is great for any time you want to write something down real quick, and don't want to have to open up notepad, or Microsoft word or whatever. You just click a new tab, and there it is, a big blank space where you can type. And on the left side, you can see you can create a new blank note, so you can separate everything out if you want to. And it does appear to save all your notes, it's not like it deletes them when you close Chrome, but if you do want to save them as a file, you can click the gear, and hit "Save Draft", or just hit Ctrl S, and it will save your note as a text file instantly. And here's a really cool thing it can do also. If you type in a mathematical equation, such as 5 + 5, then hit enter, it will give the answer. This is awesome if you have to do a few quick calculations, and want to be able to keep track of them all. So yea, really simple, and really awesome.

Tool No. 67

Moving on, Number 6 is an extension made byGoogle themselves, called "Password Alert". And it's actually a security extension meant to let you know if you are getting phished, meaning you typed in your password somewhere you shouldn't have. How it works is if you're on any website, and you type in your Google password on any site besides Google, it will warn you what you just did. So if you type in your password into a site that might look like Google, it will tell you, Google job dummy, you just had your password stolen because this wasn't a Google site. So it doesn't stop you from getting phished, because it's not tracking every website you're going to, just tell you after the fact. But at least, in that case, you know to change your password immediately. Now one thing to keep in mind, if you use your Google password for any other sites, which you should NOT be doing, it will warn you if you log into those sites, because you did type in your Google password, it just happens to be the password to that other site as well. But again, don't reuse password, you should know this by now.

Tool No. 7

Ok, number 7 is also password related, but it's a bit more useful day to day. This one is called "Show Password", and as the name suggests, if you go to type in a password so it's blocked out with asterisks, you can hover over it to reveal it. You might be wondering, well why the heck would I want to do that? And I'll ask you this, how many times have you gone to type in your password, and especially if it's a long one, you feel like you just hit a wrong key while typing it. So what do you do? Of course, you go and delete the whole thing and type it in again, and I hope you don't type it wrong a second time. Instead, if you think you hit a wrong key, you can just hover over the blanked out password, and look, then maybe only need to hit backspace once and fix one letter, instead of typing it all over again. Yea it might not seem like it will save a ton of time, but if you do this pretty often, you'll be glad you had it.

Tool No. 8

Alright next up, this one is pretty fun mostly, but also useful to anyone who might be a developer. It's called "WhatRuns", and it can tell you all sorts of information about what software and frameworks were used to build any website. So let's go on some tech news website ArsTechnica, and see that hmm, it looks like they use Ruby on Rails for the web framework. Plus it shows you stuff like what programming languages are used, what kind of web server, what they use for analytics, and it looks like even WordPress among others. Let's take a look at YouTube even. It tells you what kind of advertising they'reusing, which is Adsense obviously, and they're using the Polymer Javascript framework. Interestingly, YouTube actually looks pretty simple, they don't have a ton of different frameworks and addons and widgets, probably because everything is a custom build I'd assume. This one I think is good if you're just curious about building websites or already do it.

Tool No. 9

Ok got a couple more, number 9 is "ClipboardHistory". This one is pretty straight forward, it just keeps track of things you've had on your clipboard in the past. So whenever you copy something new, you can access what was there before by clicking the extension icon, where it gives you a pretty comprehensive list. It shows you what was there before and when you added it to the clipboard, and if you want to switch between things, you just click on them. Then on the right next to each one there are options to favorite them, view the entire text if it was really long, and even store them on the cloud, which uses Chrome's cloud API, so it's stored on Google's servers, and only accessible to your Google account logged into Chrome. Of course, if you want you can disable it from tracking the clipboard by disabling monitoring, and you can hit the trashcan to clear all the history, but it won't clear what's currently on the clipboard, probably because that controlled by windows. Still pretty cool.

Tool No.  10

Alright, finally we have an extension called"VisualPing", which is also related to a website, and it's a service that basically lets you monitor websites for changes or a section of a website, and then will notify you if it does. With the extension, you can either choose to have the website's server do it, in which case the free version lets you check once or twice a day, or let your browser do it and check as often as you want. Of course, the difference is if you use your own browser, you have to keep it running, and you'd have to be sitting in front of the computer to see the notification right away. Whereas if you use the cloud, it will check whenever, and email you a notification when it happens. You can probably imagine some good uses for this like maybe there's some product out of stock you want to buy, you could use this to keep track if it comes back in stock. Or you're just waiting for some website to update with new information of any kind, in that case as well. I think you get the point. So yea, that's it, 10 cool chrome extensions doubt you've heard of, except maybe a couple. I'll see you next time, have a good one.


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