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System Software
System Software
Operation
Systems
An operating system is the software that controls the
computer's use of its hardware resources. These resources include
the keyboard, mouse, printer, monitor, storage devices, and memory.
An operating system also provide services to run programs,
manage data, and ensure efficient operations of the computer system. These
services are classified into two categories:
- External services to help end users start programs,
manage stored data, and maintain security. These services are invoked
by the user thru commands that be issued using a command-line, menu, or
graphical user interface. Windows 98 is an example of an operating
system that uses a Graphical User Interface (GUI).
- Internal services are "behind the scenes"
services that are provided to ensure reliable and efficient operations of
the computer system. These are not generally under user
control, but instead are controlled by the operating system itself.
Examples includes control of input and output, system resources allocation,
storage allocation, and hardware failure detection.
Utilities
Utilities
are a subcategory o system software designed to augment the operating system by
providing a way for a computer user to control the allocation and use of
hardware resources. Some utilities are included the operating system
others are purchased separately from software publishers and vendors. Examples:
- Formatting Disks
- Copying data between disk
- Backing-up data
- Recovering Deleted files
- Compression
- Data Encryption
- Virus Protection
Device Drivers
Device
drivers are system software that tells the computer how to communicate with
peripheral devices. Examples are Print, Mouse, and CD-ROM drivers.
Programming Languages
Programming
languages are translators that convert English-like programming instructions
into a format that computers can interpret and directly
process.
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