Operating Systems

 Operating Systems:-

    Operating System is a set of program  which contain set of instructions for coordinating the activities between hardware is known as Operating Systems..with this o.s the system identifies input from mouse,webcamera,keyboard and helps in displaying the output on the monitor.Not only this  to do all other works the os need to the systems.All most all os perform similar functions.There are some other os which are helpful to count work and administrator security.the os used in mainframe computer in different from desktop computers ..Like this the os in a pc is different from apple computer.one os is working with the application software is not work with another..

  

OS -Functions:-

   The power supply sends signals to all devices including motherboard when we switch on the systems.When the power goesoff it searches for ROM  which contain BIOS .It contain start-up functions odf system.the bios make a few power -on self -tests posts whether the computer hardware  computers on fixed correctly...Automatically some beeps sounds and some messages and displayed on the monitor..The memory capacity,monitor,keyboard,diskdrive type time &date setting etc.,After these bios searches for system files.this is also a specific os .First the os checks for give on drive A,then bios  searches in drive C. In base other system this will be in CD ROM, DVD -ROM drive.After identified the systemfiles,they will be located in memory and the memory which in having memory will take for all control of computer,..

   The operating system are so many types.there are  DOS,Windows 3.x,windows95,windows NT,windows 98,windowws 2000,windows ME,windows xp,windows vista,windows NT server,windows NT work systemwindows 2000 server,unix ,linux,windows 2003 services etc.,,,