Types and Components of a Computer System
- Created by: autummrosemc
- Created on: 16-10-15 10:47
Hardware
HARDWARE
- all the physical parts of a computer that you can see, touch and pick up
- either external or internal
- it works with computer code
examples
- mouse
- keyboard
- mointer
Software
SOFTWARE
- coded programs that control how to computer works
- cannont be touched or picked up
- without it most hardwares would be useless
- 2 types of software = application software and system software
Application software
- Word Procesor eg. word
- Spreadsheets eg.excel
System software: This type of software includes operating systems and different utilities to allow your system to run smoothly. System software often manages the computer's resources.
- Graphic Drivers
- Debuggers to identify system errors
- Compression Software
- Encryption Software
- Disk Check
Main Components of a Computer System
Input devices
- keyboard, mouse
Output devices
- monitor
- printer
Secondary Storage Devices
- DVD
- R/W drive
- removable hard disk drive
Internal Hardware : Central Processing Unit
Central Processing Unit (CPU)
- interprets and executes the commands from the computer hardware and software
- it used to be of discrete componets combiend toghter on circuit boards
- now its referred to as microporcessor
Mircoprocessor
- is a single integrated circuit which is the heart of most PC's
- found in many household devices eg. car egine
- controls the input and out put devices through the ALU
- ALU- carries out calculations and makes logical descions and the immediate acces store
Internal Hardware : Internal Hard Disk Drive
Internal Hard Disk Drive (HDD)
- is the computers main internal storage
- appilcation software, disk operating systems and files are stored
Main advantages
- fast data transfer
- fast acces times
- their large capacity to store data
Internal Hardware : Random Access Memory
Random Access Memory (RAM)
- is an internal chip were data is temporairly stored when running applications
- memory can be written to read
- its refered to as Violate or temporary memory
- when turned off losses all its data
Internal Hardware : Read-Only Memory
Read-Only Memory (ROM)
- is a memory used to store information that needs to be permanent
- its often used to contain data
- they cannont be altered
- can only be read
Main Advantages
- its stored on the Rom Chip
- dosent lose stuff even when power is turned off
- contains BOOT file, tells us what to do when it turns on
- BIOS- stoes data, time and system configuration
- COMS is usually battery powered
Operating Systems
operating tasks
- contol the opertation of the imput
- Supervise the loading, running and storage of application programs
- deals with errors
- maintains security
User Interfaces : Command Line Interface
Command Line Interface (CLI)
- requires a user to type in instructions
- the user therefore has to learn a number of commands just to carry out basic operations
User Interfaces : Graphical User Interface
Graphical User Interface (GUI)
- allows user to interact with a computer
- using pictures or icons
WIMP
- windows
- icons
- menu
- pointing
POST-WIMP
- interaction, where fingers are in contact with the screen
- pinching, rotating
User Interfaces : Differences
CLI
Adantages
- direct communitcation
- user is not restricted
- possible to alter seetings
Disadvantages
- user needs to learn a number of basic operations
- all commands need to be typed
- its difficult to edit once commands are entered
PC/Desktop Computer
its made up of a seperate moniter, keyboard and mouse
Advantages
- spare parts
- less likely to be dameged
- internet acess is more stable
- better specification
Disadvantages
- not portable
- more complicated
- harder to move files from one place to another
Laptop Computers
is where all the components are put toghter inseide the machine, this makes them portable
- light weight
- lower powerr consumption
- processor shouldnt generate to much heat
Advantages
- portable
- light weight
- simpler to use
- everything is in one place
Disadvantages
- easier to steal
- limited battery life
- awkard to use
Tablets
they are
- touchscreen
- dont use a keyboard
- wifi or 3g/4g
- cameras
- bluetooth
- lower weight
- battery life
- phablet-slightly smaller screens
Advantages
- very fast to turn on
- touchscreen
- fully portable
- longer battery life
Disadvantages
- limited memory
- expensive to run
- touchtyping can be slow and error prone
- transferring flles can be done throguh stores
- cant run softwares as well as laptops
Smartphones
they can
- run a number of computer applications
- send and recieve emails
- take photos
- communicate
- surf the internent
- sytream videos
- stream music
- instant messaging
Advantages
- small in size and weight
- make phone call as well as connect to the internet
- used almost everywhere
- resonable battery life
Disadvantages
- small screens make it hard to read
- web browsing and photography drain battery
- memeory size isnt as large
- data transfere is slower
- lose it easier
Smartwatches
they can
- do the same as smartphones
- use bluetooth
- intternet connectivity
- ability to take and make phone calls
- messaging via text or video
- fitnees and health
- Gps
Advantages
- more convientent than smarthohones
- very easy to use
Disadvantages
- relatively large and bulky
- tend to be rather unattractive
Mainframe Computers
its used in commercial buisnesses,eg banking
main features
- several cpu's
- fast proccesor speeds
- mutiple operating systems
- huge amounts of storage capacity
- huge internal memories
- time sharring or batch processing
Emerging Technologies : Artificial Intelligence
Is a Identfication Softwear which uses finger print and facial regonition softwears, they dont always work because if you dont out yuour fingers on correctly it might not reconisg you as if you grow old or wear glassses facial regontion might not always pck it up
ex) they may ask you in custems to uses finger print regiontion to see if its actually you
Emerging Technologies : Vision enhancement
low-vision enchancer- is used to allow images to be projected inside the headset in front of the eyes. , this effiectavily brings objects closer fir eamination by the user of the system
Night vision enchanment-amplifies infared light and visibler light so that an image can be seen on apparent darkness eg)military uses it to carry out surviellence at night
Emerging Technologies : Robotics
is used in industries and factories to build or help with things humans find hard
a Drone is one type of robot, used by eveyone, its surveys llandscap takes pictures of houses of videos things from above
A surgical Robot is another type of robot which is used to help docotros preform complex procedures with more procession flexibilty and control than standard techniques ], it has cameras and joints that move like humans.
eg) used in car factories to help welc car bodies or sprahy body pannels or fit items such as windscreens
Emerging Technologies : Quantum Cryptography
is the science of making a message unintelligable to any unauthorised user eg) a hacker
this is usful for a while but then but then once the cyptography is old its easier to hack
its based on the use of photons, and thier physical properties to produce virtually unbreakable cryotgraphy system
Emerging Technologies : Computer-Assisted translat
it
- exists online as a language translator
- it translates sentences and other things but can never convert the true message over as it understands it in a different way
- another name is CAT
Cat
- tries to overcome that issure by :
- making them learn +grow
- have a memorie
Emerging Technologies :3-D and Holographic Imagery
holography is a techology that allows 3d images to be produced
the techionlogy involves
- a source of laser light
- interferance of light
- light diffraction
- light intensity recording
as a holgraphic image rotates it apperas to move.
its reflected offf the object on to a photographic plate
holographics have appplications
- engerniring desgin
- architercure
- medical imaging
- cinema,gaming effects
- stimulatios
Emerging Technologies : Virtual Reality
is an artificial enviroment created by softwear
the user makes data googles,sensor suits or helmets to get a feeling of reality
its used it training and gaming and educational
as this makes you feel more emursed as if you were actually there with a bomb and had to demantel it before it exploded or in a shootng game and where trying o kill someone or in a history lesson exploring a castle
its used in
- education and healthcare
- games and military
- fashion- to see what it will look like and make changes
- heritage - show monuments
- business- training courses
- engerniring and scientific visualation
- sport and media
Mail Merge
is a procees used to create personolised email or preadressed emails. you make it in word. they are used to se time and make writing a bunch of emails quicker to write as you dont need to remeber their details
Application Software
Programs that allow the user to do specific tasks
Word Procesor
- manipulates text documents
- creats and edits
Application Software
Programs that allow the user to do specific tasks
Word Procesor
- manipulates text documents
- creats and edits
Application Software
Programs that allow the user to do specific tasks
Word Procesor
- manipulates text documents
- creats and edits
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