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%u062c%u0645%u064a%u0639 %u0627%u0644%u062d%u0642%u0648%u0642 %u0645%u062d%u0641%u0648%u0638%u0629 %u0640 %u0627%u0625%u0644%u0639%u062a%u062f%u0627%u0621 %u0639%u0649%u0644 %u062d%u0642 %u0627%u0645%u0644%u0624%u0644%u0641 %u0628%u0627%u0644%u0646%u0633%u062e %u0623%u0648 %u0627%u0644%u0637%u0628%u0627%u0639%u0629 %u064a%u0639%u0631%u0636 %u0641%u0627%u0639%u0644%u0647 %u0644%u0644%u0645%u0633%u0627%u0626%u0644%u0629 %u0627%u0644%u0642%u0627%u0646%u0648%u0646%u064a%u062951Process 2 3 1 4 2 3 Time 122 50 02 22 122 50 End 02 122 102 152 222 240 C- Network Operating Systems A network operating system (NOS) is a computer operating system that is primarily designed to support Servers. Network operating system provides printer sharing, file system shared, database sharing, application sharing, network management ability, security, and other aspects of network housekeeping. d- Utility Programs A program that makes a computer easier to use or performs highly specialized functions. Service programs are used to manage disks, troubleshoot hardware problems, and perform other tasks, the operating system itself may not be able to do as it may include some but not all service programs. The following represents some types of service programs. %u2022 Antivirus software Antivirus software is a program or set of programs that aims to prevent, search for, detect and remove viruses and other malicious software. A computer without antivirus software installed will be infected within minutes of being online. There are many different companies that build antivirus software and the offerings can vary but they all perform some basic functions:
