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Technology Bites (Week 2: Computer Concepts (Computer Functions (Hardware,…

- - - - Processing
        
        Aka 'CPU'
        
        CPU Speed
        
        how quickly it can carry out task
        
        Measured in GHz
      - Storage
        
        records and/or retrieves items to and from storage media
        
        Reading- STORAGE MEDIUM TO MEMORY
        
        Writing- MEMORY TO STORAGE MEDIUM
        
        System Storage
        
        Used for standard operations
        
        E.g. RAM, Cache, ROM
      - Secondary Storage
        
        Stores data more permanently without the need for electricity
        
        Storage Media Type
        
        Magnetic Storage
        
        Uses iron oxide partices
        
        Microdrives
        
        Data stored on a disk 1 or 2 inches in size
        
        Optical storage
        
        Optical laser burns pits into surface of a highly reflective surface
        
        Solid State storage
        
        Uses flash memory
        
        E.g. USB Flash Drives
      - Input and Output
        
        Input device- captures and enters raw data
        
        E.g. Keyboard, Touch screen, Gamepad, Digital camera
        
        Output device- allows observation of results
        
        E.g. Printers and plotters, Sound Systems
    - - Application Software
        
        Programs written to perform tasks
        
        Provides services for people
        
        Productivity Software
        
        Word Processsing
        
        Spreadsheet
        
        Presentation
        
        Database
        
        Personal Information Management
        
        Software Suite
        
        Collection of application software packages sold together
        
        Software for Information, Decision Support & Specialized Purposes
        
        Voice stress software do detect fraud
        
        Increase cancer cure rate
      - System Software
        
        Controls the hardware
        
        Runs the computer system
        
        Operating system(OS)
        
        Acts as an interface between software and hardware
        
        Dish management tool
        
        Multi-tasking: ability of OS to run several programs simultaneously
        
        Device Driver: must be installed in order for OS to recognize and communicate with the deivce
        
        Utility Progams
        
        Assist machine in running smoothly, securely and efficiently
        
        E.g. Virus Detection, Spam and Pop-up blocker
        
        Assist people in maintaining and manipulating system resources
        
        E.g. WinZip, CD/DVD Burners
  - - - any number of software applications
      - Types: Supercomputer, Server, Work Station, PC
    - - one particular function
      - E.g. Kiosk, Digital Camera, Game Console
- - - - exchange/transfer
        
        services
        
        funds
        
        goods
    - - Transmit standardized transactions
        
        Using Private communication networks
        
        Called value added networks
        
        Between partners and suppliers
    - - Information system
        
        Supports and records transactions
      - Two methods
        
        Batch processing
        
        collected and processed in batches
        
        Online transaction processing
        
        Takes place at point of sale
  - - - 3.Selecting vendor
      - providing payment
      - Researching product
      - accepting delivery
      - 1.Realizing need
      - using product support
    - - Marketing and advertising
      - 4.Payment support
      - Product/service production
      - Delivery
      - 1.Market research
      - 6.After sales support
- - - - It is a wire
        
        2 computers connected to it can be connected
      - Server
        
        Special Computers connect to Internet
        
        Contain webpages
        
        Files on server's hardrive
        
        Has unique Internet Protocol address
        
        Helps computers find each other
        
        Computer at home
        
        known as clients
        
        Not a server
        
        not directly connected to internet
        
        Connect through Internet Service Providers
        
        Network Architecture
        
        Client-Server
        
        Computer servers distribute data
        
        Peer-to-peer
        
        facilitate communications directly between clients
    - - application of internet
      - web browsing: URL aka web address
        
        finds specific webpage
        
        made up of
        
        Hyper Text Transfer Protocol
        
        http
        
        language computer and browser
        
        World Wide Web
        
        www
        
        domain name
        
        e.g. google
        
        unique name
        
        extension
        
        .com
        
        useful information about website owner
        
        e.g. .com means global economy
        
        default file name
        
        idex.html
        
        home page
        
        path
        
        e.g. /share
        
        specific webpage within website
      - hyperlinks interconnect websites