Computer Systems notes
88 notes by 83 users · Page 2 of 3
This Computer Systems page on GoConqr gathers user-made notes on hardware, software, storage and data representation. School students can use them to revise these topics, while teachers can find ready-made material. The collection has over 70 notes for school-level study, including GCSE Computing. Choose a note to start.
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- Hardware and Software791
- Types of Computers197
- System Architecture and the CPU822
- Computer Performance233
- Computer Memory268
- Secondary Storage547
- Input and Output Devices344
- Types of Software80
- Operating Systems and System Software184
- Data Representation80
- Logic Gates42
- Data Transmission14
- Computer Security20
- System Life Cycle11
- System Reliability11
Notes
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1.1 System Architecture - created from Mind Map Embedded systems Computer Components CPU & Fetch, Decode and Execute
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A2-Computer systems answers Q1)A software company decides to release a duplicate file finder which it has named “DeDuplicator”. Duplicate files are files that are exactly the same (bit for bit identical). Space is often wasted on computers by ha...
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Systems Architecture - created from Mind Map Von Nuemann Control Unit (CU) Arithmetic Logic Unit (ALU)
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Intro To IT 1) Information Technology [IT] IT encompasses all of the technologies that we use to create, collect, process, protect and store information. It refers to hardware, software and computer networks. 2) ICT (Inform...
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Printers Dot Matrix A dot matrix printer is an impact printer that transfers characters by striking a pattern (from a matrix) through an inked ribbon and onto paper The most common number of pins providing a higher resolution....
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Revision 1a. Identify two input devices that you could use to select a song on his computer system. mouse Keyboard B. Identify one out put device you could use to listen to music.
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Computer - creado desde un Mapa Mental Input/Output Processor Memory
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Computing notes / week 2 Computer use millions of electronic circuits and switches which can either be On or Off On is represented by 1 and Off is represented by 0 0 or a 1 = 1 Bit (Binary Di...
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Untitled RAM AND ROM is the main memory RAM- random access memory Volatile memory-temporary memory RAM requires power to retain data and information- or RAM will lose data RAM is slower than the cpu cache but alot fa...
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Computer Science Paper 1 - created from Mind Map Binary and Hexadecimal Communication and Internet Technologies Logic Gates and Logic Circuits
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Untitled Computer Science Input Devices - any device to send data to the System E.g. mouse/ keyboard Output Devices- any device to send data outside the system E.g. Printer, monitor CPU(central processing unit) - Brain o...
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Revision - 02/05 Interpret and run simple dry algorithms:Dry run involves hand tracing the running of an algorithm to see how variables will update, what outputs will occur etc. You use a trace tables and go through you code line by l...
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Components 1 CPU Input Devices…..EG Importing data into a computer. In computing, an input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system ...
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Untitled CPU (Central Processing Unit) - memory - oporations - Results RAM - Random Access Memory - fast- temory - volatile Secondary Storage - data can be used at anytime - non volatile - flash memory Hard D...
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Computing - created from Mind Map Logic gates The output is always the opposite of the input. The output is only ever 1 when the input is 0. Both of the inputs have to be 1 for the output to be one. The output is only 1 when either of the inputs are 1...
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Untitled RELIABILITY OF COMPUTER SYSTEMS... RELIABILITY: How much a computer system be trusted in order to do its job (which is set by a human to start with) and to fill out its needs perfectly without any 'hitches'. Thes...
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Inside a Computer - created from Mind Map What is a computer? Input/ Output Devise Memory
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C.P.U process 4 Cores 1 Controller1 A.L.U (algorithm logic unit)1 M.C ( memory controller)1-2 cache1 R.A.M1 Register What is used in a C.P.U? 4 Cores1 Controller1 A.L.U ( algorithm logic unit)1 M.C (memory controller)1-2 cache1 R.A...
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UNITS 6 - 7 - creado desde un Mapa Mental Difference between hardware and software Computer architecture Computer connections
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Automated systems An automated system refers to a combination of software and hardware design programmed to work automatically without the need for any human intervention such a system makes use of: 1. Sensor Sensors are input devices ...
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More Revision Dry Run- Running of an algorithm to see how variables update and outputs. Has instructions are coded as bitsPrograms are compiled into machine code before running.Instructions to CPU are processed as part of fetch-exe...
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TYPES OF COMPUTERS - created from Mind Map MAINFRAMES COMPUTERS PC/DESKTOP COMPUTER SMARTPHONES
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Untitled MemoryDifference between RAM and ROM: RAM is the main memory in the computer It is required for the operating system, applications that are loaded and any data currently in use. The more RAM available to the computer,...
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Untitled Summary of the CPU The CPU of a computer is a piece of hardware that carries out the instructions of a computer program. It performs the basic arithmetical, logical, and input/output operations of a computer system. T...
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HARDWARE AND SOFTWARE - creado desde un Mapa Mental COMPUTER HARDWARE COMPUTER SOFTWARE THE LINUX SISTEM
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EVERYTHING! - created from Mind Map CPU ROM RAM
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storage - created from Mind Map solid state optical storage magnetic storage
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Hardware - created from Mind Map CPU CPU RAM
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Computer system - created from Mind Map Input Devices Output Devices Storage Devices
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RAM RAMmemory used by programs runningprograms use memory to solve info required to run the softwareRAM stores instructions that are sent to CPU to decoded and executedvolatile memory is were the contents of it is erased ...
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Secondary Storage Secondary StorageSecondary storage is also known as external storage that is not under direct control of the computer's CPU. So basically secondary storage is used to back up primary storage by replicating itself and ...
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Storage - created from Mind Map Capacitykilobyte megabyte gigabyte terabyte petabyte exabyte zettabyte yottabyte Zip Disks Floppy Disk- shutter -shell -liner -magnetic coating -metal hub -flexible thin film
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Notes on RAM and ROM RAMMemory used by programs runningprograms use memory to solve info required to run the software RAM stores instructions that are sent to the CPU to decode and executevolatile memory is where the contents are erased o...
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Types and Components of Computer Systems - created from Mind Map Hardware, Software and Computer Types Hardware Software
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SYSTEM UNIT - created from Mind Map SYSTEM CHASSIS container that houses most of the electronic components that makeup computer system SYSTEM UNIT contains system's electronic components and selected secondary storage devices SYSTEM UNIT TYP...
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notes ram is the memory used by programs that are runningram is volotile, it will wipe itself clean when the computer is turned off. dram dynamic ramstatic ram sramdram refreshes every 2 millersecondssram does not refresh b...
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Hardware - created from Mind Map what is RAM? what is ROM? what is cache?
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Data Representation - created from Mind Map Binary LogicData is represented in computers in binary form as binary code is made up from ones and zeroes and the computer system can only understand ones and zeroes so other programming languages would be unreadable...
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ICT CHAPTER I - Types and Components of a Computer System hardware - physical components external mouse keyboard speaker microphone monitor printer internal motherboard ROM/RAM CPU GPU Sound Card HDD/SSD Processor Battery s...
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Computer Systems A computer system consists of hardware components that have been carefully chosen so that they work well together and software components or programs that run in the computer. The main software component is itself an ...