Video: Sharing

﻿Hi, I'm Cash, your computer science teacher for the computer systems unit. Welcome back to the last lesson in this unit. In this lesson, we're going to be looking at open source and proprietary software. For this lesson, you are going to need a pen, some paper, and you're going to need to remove any distractions that are going to stop you from focusing. Once you've done that, let's begin. In this lesson you will, explore the implications of sharing programmes, and discuss open source and proprietary software. Use a programme. Follow the link to visit the Naughty Elf programme in Scratch. Take 3 minutes, to run the programme, and explore what it does. Pause the video to complete your task. Task 1, Naughty Elf programme. Using the worksheet, complete task 1. Resume once you're finished. Task 1 use a programme solution. So the elf allows you 4 tries to guess its lucky number, which lies between 1 and 20. The elf picks a different number each time you play and claims you'll never be able to guess it. Did you guess the correct number? I didn't. Let's have a look inside. On the project page, you can run the programme and interact with it. You are the user. The See Inside option has been highlighted on the right. Now, did you see this button whilst exploring the programmes behaviour? And what does this button do? Write your answers down. Okay, lets have a look at what that button does. The See Inside button takes you to the editor where you can study the programme instructions. So you can see the programming that's been written to build that programme. There's another button which is the Remix button. Okay? Have you pressed this button on another persons programme? What does the button do? Write your answers down. Okay, let's see what that button does. So, the Remix button creates a duplicate of the project that you own and that you are able to modify. Implications. What do you like about being able to See Inside and Remix projects? And how do you feel about other people being able to do that with your projects? Pause the video to complete your task. Task 2, implications. Using the worksheet, complete task 2. Resume once you're finished. Task 2 implications solution. So the positives could be, I could build on other people's ideas, I can see how an interesting programme works, I can help spot errors and improve programmes built by others, and I can look for malicious code. And on the other hand, I don't like other people stealing my ideas, I don't want to reveal how my programme works, and what if other people think my code isn't good enough. Free and open source software. The creators of a programme can choose to provide access to its source code. Anyone can see inside the programme to understand how it works, check for errors, suggest improvements, and remix it. This is called free, as in freedom, Libre, or open source software. Sometimes abbreviated as FOSS or FLOSS. Can you think of any examples of free, Libre, and open source software? Let's see if you get the ones that we've got on the next slide. Let's have a look. So we've got a whole range there, Firefox Chromium Scratch LibreOffice VLC GIMP Audacity Inkscape Linux Ubuntu Android and Python. And they've all got their very own uses listed under. So these are all examples of popular open source programmes. Floss is also used extensively in science, space, machine learning, and so on. Proprietary software. So the creators of a programme can also get users to agree to terms where the user cannot modify the software or distribute it to anyone else. So it's the opposite of open source. This is called proprietary software. Proprietary software is closed source software. The original source code is not accessible and you can't see the actual code written in the programmes. Or written by the programmers. Most applications are proprietary software. Both the Windows and the Mac operating system are proprietary. As are a large number of applications that are used in most organisations. Such as Microsoft Office. That's the end of this unit. As a recap, in this unit you investigated different layers of computing systems. From programmes and the operating system, which was the software. To the physical components that function together as a system to execute these programmes, which was the hardware. And finally, to the fundamental binary building blocks that these components consist of, which was the logic. I hope you got a better understanding of the difference between open source and proprietary software. And also a better understanding of what happens under the hood in a computer system. If you'd like to share your work with us, please do get your parents or carers consent and you can share it with us on Instagram, Facebook, or Twitter tagging @OakNational and #LearnwithOak. Thank you for joining me on the computer systems unit and all the best for the future. Thank you.

Worksheet: Sharing

Exit Quiz: Sharing

Completed: Sharing

Learners will move away from the technical aspects of software and hardware that have been the focus of the unit and learn some of the key concepts of open source software. They will explore this through a discussion about some common Scratch practices that they are already familiar with ( sharing, ‘seeing inside’ projects, and ‘remixing’), and a reflection on the implications of these practices.

Computing

Sharing

Video

Worksheet

Final Quiz

Lesson Complete