IT

• System software


  Consists of the operating system, utilities, compilers and drivers
• Parts of System Software


  • Operating Systems
  • Drivers
  • Programming Tools and Related Applications
  • Utilities
• Operating Systems


  • Provide a user interface
  • Load and run programs
  • Manage the computer's resources
• Command Line Interface


  Early operating systems used a text-based interface, with commands being typed at the command prompt
• Graphical User Interface (GUI)


  Makes use of Windows, Icons, Menus, Pointers
• GUI


  • Icons and options on menus represent folders, applications and other commands
  • A mouse is normally used to direct the pointer around the screen
• Operating System Resource Management


  • Controls Input and Output (I/O)
  • Manages File Management
  • Manages Memory
  • Manages Processes
• Drivers


  Small, specific programs that provide the operating system with information needed to work with a hardware device
• Programming Tools


  Computer programs that can be used to create programs that work on their own, support other programs or applications, and/or interact with the resources on a device
• Integrated Development Environment (IDE)


  Consists of a source code editor and a compiler or interpreter with other add-ons that make the environment easy to work with to develop applications
• Programming Tools


  • Unity (game development)
  • Codename One (cross-platform mobile app development)
  • PhoneGap (cross-platform mobile app development)
• Source Code


  The original code written by the programmer
• Executable Code


  The object code that can be directly executed in Windows
• Utilities


  • Defragmentation
  • Scheduling tasks
  • Updating
  • File compression and extraction
  • Backup
  • Install and uninstall software
  • Security- firewall and anti-malware
• Disk Defragmenter


  Rearranges fragmented data on a mechanical hard disk so the disk can work more efficiently
• Flash drives and solid-state drives do not need to be defragmented as they do not have moving parts