4 BASIC OPERATIONS

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Computer ProgrammingSoftware
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Two Basic ClassificationsSystem / Application
Software
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• System Software
• is any computer software which manages and
  controls computer hardware Linux, Microsoft
  Windows, and Mac OS X are examples. System
  software performs tasks like transferring data
  from memory to disk, or rendering text onto a
  display device.

• Application Software
• are programs that enable the end-user to perform
  specific, productive tasks, such as word
  processing or image manipulation . Application
  software employs the capabilities of a computer
  directly to complete a task that the user wishes
  to perform.

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One way of demonstrating the relationship between
them
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• Software Categories
• Vertical software
• developed for a specific 'type' of client,
  usually a specialist of some kind (e.g.
  accountants, doctors, retail outlet)
• may be customisable
• Custom software
• written for a specific client
• Horizontal software
• designed to be useful for a wide range of users
  performing varied tasks

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• Software User Interfaces
• Text-based interfaces (CLIs)
• Command line user types in specified commands
  with fixed syntax (example)
• Menu-driven user chooses from a 'list' of
  options ('point and shoot') (example)
• Graphical user interfaces (GUIs)
• user works with operating system through the GUI
• places special demands on hardware (especially
  display and memory)
• applications are 'tied' to the interface
• supports multitasking though use of windows

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The Art of Writing Software https//www.youtube.c
om/watch?vQdVFvsCWXrA
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