Archive for Operating System

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Operating System

Posted on May 5, 2013 by

An operating System (OS) is an intermediary between users and computer hardware. It provides users an environment in which a user can execute programs conveniently and efficiently.

In technical terms, It is a software which manages hardware. An operating System controls the allocation of resources and services such as memory, processors, devices and information.

Definition

An operating system is a program that acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs.

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3 comments Posted in Notes/References, Operating System
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Windows Short-Cut Key Combination

Posted on April 16, 2013 by

Windows system key combinations

  • F1: Help
  • CTRL+ESC: Open Start menu
  • ALT+TAB: Switch between open programs
  • ALT+F4: Quit program
  • SHIFT+DELETE: Delete item permanently

Windows program key combinations

  • CTRL+C: Copy
  • CTRL+X: Cut
  • CTRL+V: Paste
  • CTRL+Z: Undo
  • CTRL+B: Bold
  • CTRL+U: Underline
  • CTRL+I: Italic

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One comment Posted in Operating System
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Computer Terms and their Meanings

Posted on April 11, 2013 by

Some Computer Terms:

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Terms

Definitions
3D reference use this reference to analyze data that is in the same position on multiple worksheets in the same workbook
ALU Carries all mathematical and logcal decisions
Antivirus software  

“A computer program used to scan a computer’s memory and disks to identify, isolate, and eliminate viruses”
App Typically used to describe a software program on a smartphone or tablet computer
Application A computer program designed for a certain type of work like word processing
Application software “A category of software programs that helps you perform a specific task such as word processing (can also be called application programs, applications, or programs)”
5 comments Posted in Computer Fundamental, Database Management System, Networking, Notes/References, Operating System, Presentation, Spreadsheet, Webpage Designing, Word Processing
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Classifications of Operating System

Posted on April 11, 2013 by

CLASSIFICATION OF OPERATING SYSTEMS

Operating systems can be classified into different types based on their interface, user friendliness, and functionality. Different types of operating systems are:

  1. Character user interface (CUI)-based operating systems
  2. Graphical user interface (GUI)-based operating systems
  3. Single-user operating systems
  4. Multi-user operating systems
  5. Single-tasking operating systems
  6. Multitasking operating systems
  7. Real-time operating systems

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One comment Posted in Notes/References, Operating System