A single-user operating system, commonly referred to as a single-tasking operating system, is made specifically for personal computers. One person can only use the computer at once. The single-user operating system permits one user at a time to access your computer, but it occasionally supports numerous profiles. 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 example of a single-user, single-task operating system is the operating system used by personal digital assistants (PDAs), also known as handheld computers. Single-user, multi-tasking operating systems allow a single user to simultaneously run multiple applications on their computer. This is the type of operating system found on most Ali's new computer uses a single-user, multi-tasking operating system. Ali wants to know which utility programs he will need to keep his computer secure and running smoothly. Discuss the utility programs Ali will need, justifying why he needs them. The quality of written communication will be assessed in your answer to this question. Here are a few examples: 1. Single-user, Single-tasking Operating System: This type of operating system allows only one user to perform one task at a time. It does not support multitasking. An example of this is MS-DOS. 2. Single-user, Multi-tasking Operating System: This type of operating system allows one user to run multiple programs Computer multitasking (CMT) "Doing multiple tasks at a time in a computer is called computer multitasking (CMT)". Multitasking is evolved from multiprogramming and has an old history. In the 1960's computers were slow. Old computers cannot perform two tasks at a time. To perform one task we had to terminate other task running. In modern operating systems (OS), we can do multiple tasks The main differences between the multiprogramming and multitasking are: 1. Definition: Multiprogramming: Runs multiple programs concurrently, sharing CPU time efficiently. Multitasking: Executes multiple tasks simultaneously, giving the illusion of parallel processing to enhance user productivity. 2. Single and Multi Tasking: In Single tasking system can run one program at a time. The Palm OS for Palm handheld computers is a proper example of a single-user, single-task operating system. Whereas a multi-tasking operating system has the capability to run more than one program simultaneously. Multi-tasking is an extension of multi-programming Multiprogramming was developed in 1950s. It was first used in mainframe computing. The major task of multiprogramming is to maximize the utilization of resources. Multiprogramming is broadly classified into two types namely. Multi-user operating system. Multitasking operating system. Multiuser and Multitasking both are different in every aspect Multi-User Operating System. A multi-user operating system (OS) is a computer system that allows multiple users that are on different computers to access a single system's OS resources tloPWS.