Computing

Computing

1. Computer systems

   • Input
     • devices
       • keyboard
       • Mouse
       • Touchscreen
       • Controller
     • The input is what in put in or tell the computer to do
   • Ouput
     • Devices
       • Screen
       • Speaker
       • TV
       • Monitor
     • This is what the end result or product is from what you did previously
   • Computer systems are found in most electronic gadgets.
   • There are input and output devices, storage, a processor and, most importantly, software
   • Embeded systems
     • They have a set thing they are designed to do and they do that one thing
       • Expamples
         • ATM Machiens
         • Rocket guidance system
         • Garage door opener
         • Airbag

2. Standards

   • Open standards are agreed so that community developers can modify source code freely available in the public domain, and do so effectively.
   • Standards agreed by the IT industry are an essential element of system design and development.
   • Hardware standards go beyond simply connecting peripheral devices. Standards exist for all aspects of computer hardware
     • Visual displays and ports; Internal connections such as SATA or PCI;
     • Hard drive characteristics; Motherboard architecture; Processor specification
   • Software standards include agreement on various file types, enabling software to use data from other systems effectively
     • For example, a number of image file types exist including png, jpeg, GIF, TIFF and various others
     • Knowing what to expect in such a file makes it possible for software packages to deal with them.

3. Data protection act

   • Data is valuable and must be protected, and the Data Protection Act attempts to regulate organisations that store data.
   • Data should:
     • be obtained for a specified and lawful purpose and used accordingly;
     • be limited to the specified data, be accurate, and up to date;
     • be kept only for as long as necessary for the specified purpose;
     • be kept securely;
     • be processed fairly and lawfully;
     • not be transferred outside the EU.