As the name implies, this operating system is designed to manage the computer so that one user can effectively do one thing at a time. The Palm OS for Palm handheld computers is a good example of a modern single-user, single-task operating system. Single-user, multi-tasking - This is the type of operating system most people use on their desktop Between a single user and a multi user operating system?Generally the kernel of the multiuser operating system has to take care that one user can't interfere with the other, much like a Time-Sharing is the logical extension of multiprogramming. In this time-sharing Operating system, many processes are allocated with computer resources in respective time slots. In this, the processor's time is shared with multiple users. That's why it is called a time-sharing operating system. It has a fixed time slice for the different processes. An Operating System is the software responsible for managing all the computer system's resources. It is the intermediary between the hardware and the user. It provides an environment through which a user can execute tasks. Also, to make the working of the system more efficient, parallel processing is done. b. Single- user , single -task operating system- This type of operating system allows only one user to do a task on the computer and one thing at a time. c. Single-user, multi-task operating system- This type of operating system is used on Desktop computers, laptops, where a single user can operate on several programs at the same time. For Single-user mode is a mode in which a multiuser computer operating system boots into a single superuser. It is mainly used for maintenance of multi-user environments such as network servers. Some tasks may require exclusive access to shared resources, for example running fsck on a network share. This mode can also be used for security purposes IxK3va5.

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