Transcript Operating Systems

Operating Systems
Define OS
• Operating System is a type of system software.
• Operating system software includes instructions
that allow a computer to run.
• An operating system is a set of instructions
designed to work with a specific type of
computer.
GUI
• GUI stands for graphical user interface.
• Interface is the manner in which a computer
system presents information to another
computer or to a user.
• A graphical user interface means that the work
you do often depends on your ability to use a
mouse and to click on icons, menus, options,
and buttons.
• Most operating systems today use a GUI.
DOS
• DOS, disk operating system, is an example of
an OS that is not a GUI.
• DOS was a command based OS with no mouse
or icons to click.
• With DOS you had to put in a command for a
program to open.
• Example…use C Prompt to pull up solitaire with
the command…sol
Windows Operating System
• Desktop – The main screen in the windows
operating system; includes icons and taskbar.
• Icons
• Taskbar
Desktop Contents
• My Computer – gives you access to all the
programs, documents, data files, floppy drives,
and CD-ROM drives on your computer.
• Application Shortcut – arrow indicator; gives
you a quick way to start the application.
• Recycle Bin – Stores the files you delete
• Start Button – Opens the start menu, from
which you can access programs and
documents.
• Quick Launch toolbar
Cont. Desktop Contents
• Taskbar – bar located at the bottom of the
desktop; as you work with applications,
application and document names appear on the
taskbar.
• System Tray – some applications place an icon
in the area at the right end of the taskbar to
provide a quick way to start the associated
program.
• Clock – shows the current time of day; doubleclick to change the time, date, or time zone.
Important Keystrokes
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Esc (Escape) – used to cancel actions
Ctrl+Esc – shortcut to activate the Start Menu
Windows Key – opens Start Menu
Alt+Tab or Alt+Esc – lets you switch from one
open window to another
• Alt+F4 – closes the current window; good for
pop-up windows.
Important Info from Worksheet
• Discuss worksheet
Different Types of Operating Systems
• Mac OS – runs on an Apple Macintosh
computer
• Microsoft Windows – over 90 percent of users
have a Windows OS
• UNIX and Linux
• UNIX - one of the first operating systems ever
written; it was designed to work on powerful
business and scientific computers
• Linux – free and can be downloaded from the
Internet; can be bought with included other
features