Input are the devices giving information into the computer. Processing Unit is the processing of Information. Memory Unit or the MU is the storage of information (data/program). Von Neumann computer systems contain five main building blocks:the central processing unit (CPU),memory unit, arithmetic logic unit,and input/output devices.These components are connected together using the system bus. The von Neumann model was invented by a scientist called John Von Neumann in 1945. paper jammed in the printer)īuffers- Loading, this can occur by the slow speed of the input device, causing the output device to be slower than usual. disk drive is ready to receive more data. Interrupts- Signal sent from a device or from software to the processor, meaning that the processor will stop temporary during the interrupt. When the computer shuts down, it deletes all the data which has been loaded from the memory (RAM), then they will repeat the same process above when the computer is turned on again. If there aren’t any errors, the OS will be loaded into the memory. These make sure that the hardware, processor, internal memory are functioning correctly. When the computer is first powered up, the initiating programs are loaded into the memory from the ROM (Read Only Memory). Some devices do not need operating systems because they carry out basic functions only, for example light switches, they don’t need complex functions just turning on and off. Nowadays, there are other devices which have OS’s in them, for example smart TVs and smart fridges. And android, iOS, blackberry OS for mobile phones. The most common OS are: Windows, MAC OS, Linux, Android, UNIX and DOS.Ĭommon computer operating systems are linux, windows, MACos. 
Of course there are more of the OS benefits but these are just some of them.
Input and Output controls- Controlling other devices like printers. Security- Passwords, no information will get leaked. Error handling- Refers to the anticipation, detection, and resolution of programming, application, and communications errors. Multitasking- Allowing you to open many applications at a time. Operating System is a software running for computer systems, they can be useful for many things such as: In this unit we’ll be learning about OS (Operating Systems) and what they can do for us.
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