System software / Introduction to computers

System software -hardles technical details,  works with user,  hardware and application software.
Operation system -coordinates computer resources,  provide in interface between users and computer & run application.
GUI - Graphical User Interface - OS users elements like icons and Windows.
Multitasking - ability to switch between different application stored in memory.
Booting - starting or restarting a computer.
Warm boot- Restart computer without turning off the power.
Cold boot- starting a computer that has been turned off Three basic categories of O.S .
       1)  Embedded operating system -used for handheld computers & PDA operating System programs are stored on Rom (Read only memory)  chips.  He.  Windows Cr. Net , Palm O. S.
       2) Network operating system (NOS)  - used to control & co-ordinate computers that are networked or linked No 's hard disk he.  UNIX,  windows XP Server,  Windows NT server.
       3) Stand alone operating system - desktop operation system control a single desktop or notebook computer when.  Windows,  Mac O. S.,  Some versions of UNIX.
proprietary O. S. - owned & licensed by a corporation.
       1) windows - Popular Operating System occupies 90% market Designed to run with Inter Compatible microprocessor.
New User Interface - Luna.
Latest version - Windows Vista released in 2007 with improvements

• Security against malicious files and programs 
• Three-dimensional worldpress to display transparent cascading windows 
• Filtering capability. 

2) Mac OS - Macintosh introduced in 1984.

     Aqua user interface providing photo - quality icons and easy to use menus. 

     Sherlock is search tool on the web. 

     Latest version - Mac OS X.  also known as Tiger. 

     Spotlight - advanced search tool.

     Dashboard Widgets - constantly update and display information. 

3) Unix & Linux - Unix Originally designed for mini computer.  Now used in micro computers are server on web e. g.  Windows,  Mac OS,  UNIX Proprietary O. S.  Linux Free - open Source Operating System 

Utilities - service programs 

Troubleshooting/ diagnostic - recognize & correct problems. 

Antivirus - Protect guard computer against viruses. 

Uninstall - safety and completely remove unneeded programs 

Backup - make copies of files to be used in case the originals are lost or damaged 

File compression - programs that reduce the size of file. 

Windows Utilities - improves system performance. 

Disk Cleanup - trouble shooting utility that identifies and eliminates nonessential files. 

Fragmented - the file has to be broken up into small parts that are stored wherever space is available. 

Disk Defragmenter - eliminates unnecessary fragments and rearranges files and unused disk space to optimize operations.  

Utility suites - combine several programs into one change eg.  Microsoft Office,  Norton System works & v communication. 

1) Norton Antivirus - protect system over 21000 viruses system suite. 

2) Norton Clean Sweep - removing programs & files you no need. 

3) Web cleanup - removing temporary internet files,  history,  cookies. 

4) Connection keep Alive - Prevents dial -up internet connections from online user during periods of inactivity. 

5) Go back personal edition - will restore system configuration help to locate lost files and repair damaged files. 

Device Drivers - works with the operating system to arrow communication between Input Output devices. 

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