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Technology Bites (Week 2: Computer Concepts (Hardware - components of a…

- - - - System storage
        
        Used to store data without the need of electricity. Eg USB, CD
      - Secondary Storage
        
        Used by a computer for standard operations. Eg RAM, Cache.
    - - The CPU or chip is where most of the processing takes place. The higher the clock speed, the faster the CPU processes.
    - - Keyboards and touchscreens are examples of input devices. They capture and enter raw data into a computer system.
      - Displays such as LCD screens or monitors that display visual information are output devices. Allows one to observe results of computer processing with one or more senses.
  - - - Eg.PC, Workstation, Servers
      - Can run any number of software applications
    - - Eg. ATM, Kindle, Game console
      - Designed primarily for only one particular function
  - - - Supports the people's functions - Spreadsheet, Presentation
    - - Supports the computer's functions - Operating system, device drivers
- - - - Expansion of clientele - Local business can now tend to customers around the world
      - Businesses can more easily manage their stock and sales.
      - Sales can be made round the clock instead of only during business opening hours.
    - - E-Commerce businesses face issues of privacy and security. They face threats of being hacked, losing clientele data and important business data such as accounts, transactions and operating sites.
      - Businesses have to alter their systems in order to adapt to the E-Commerce world, and adapt to the new method of transactions
  - - - Transaction Processing System
        
        Online Processing
        
        Processing takes place immediately at the point of transaction
        
        Batch Processing
        
        Transactions are collected over time and processed all at once in batches
        
        An information system that supports and records transactions
      - An exchange or transfer of goods, services or funds.
    - - Using private communications networks called value-added networks to transmit standardized transaction between partners and suppliers
- - - - Cascading Style Sheet. The CSS allows you to design and specify the layout of web pages.
    - - The programming language of HTML and the Web. It allows one to program the behaviour of the web pages.
    - - Data generated by a website and stored by your browser to give the Internet and other websites information about the user.
    - - Hypertext Markup Language. This defines the content of web pages.
    - - Hypertext Transfer Protocol. It establishes a connection to the Internet, and also defines how messages are formatted and transmitted on top of what actions servers should take in response to commands.
    - - Uniform Resource Locator. Provides a way to locate resources on the Web. Also contains the name of a protocol (HTTP)
  - - - Client/Server networks
        
        Uses server computers to distribute data to clients (individual computers)
      - Peer-to-Peer
        
        Facilitate communications directly between clients. Participants share their folders in this system for other participants to access directly
    - - Transmission Control Protocol. The basic protocol of the Internet, used to complement IP, thus the two are commonly referred to as TCP/IP
    - - Internet Protocol. Commonly known as IP address, it is the identity of a computer that the Internet recognises it by
    - - Internet Service Provider, eg Starhub/Singtel. They provide consumers Internet access through cable or satellite