{"product_id":"2940014343084","title":"Operating System Uncovered","description":"Table of Contents:\u003cbr\u003e\u003cbr\u003eIntroduction...3\u003cbr\u003eWhat is an Operating System...4\u003cbr\u003eHistory of Operating Systems...6\u003cbr\u003eWhat an Operating System Does...8\u003cbr\u003eProcess Management...9\u003cbr\u003eMemory Management...13\u003cbr\u003eDisk and File Systems...16\u003cbr\u003eNetworking...16\u003cbr\u003eSecurity...16\u003cbr\u003eInternal Security...18\u003cbr\u003eExternal Security...18\u003cbr\u003eGraphical User Interface...19\u003cbr\u003eDevice Drivers...19\u003cbr\u003eApplication Interface...20\u003cbr\u003eMicrosoft Windows...22\u003cbr\u003eMac OS...29\u003cbr\u003eUNIX...33\u003cbr\u003eLinux...35\u003cbr\u003eGNU...37\u003cbr\u003eOther Operating Systems ...38\u003cbr\u003eInstalling an Operating System...39\u003cbr\u003eDefining the Processes...43\u003cbr\u003eCache...43\u003cbr\u003eVirtual Memory...48\u003cbr\u003eSystem Resources...50\u003cbr\u003eRAM...51\u003cbr\u003eComputer Memory...55\u003cbr\u003eConclusion...60\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eOur body couldn’t function without our brains. The brain tells the various pieces of our body how to work and how to interact. Without a brain, we wouldn’t be able to do anything at all.\u003cbr\u003eAn operating system is kind of like the brain of a computer. You have a bunch of hardware like the CPU tower, the monitor, and the keyboard, but without a CPU, they can’t do anything but power up and turn on. The operating system organizes files and lets the hardware know what it should do.\u003cbr\u003eIn the early days of computers, there was just one operating system. As computers progressed, the OS turned into MS-DOS, but computers really weren’t capable of doing much without software. Then Bill Gates came along.\u003cbr\u003eWith the founding of Microsoft, the computer operating system came into its own and brought computers to new levels of functioning and technology. Although the brand names of operating systems are few, they do perform different tasks depending on the requirements of the computer user.\u003cbr\u003eWhile the dominant OS today would be Microsoft Windows, there are other types of operating systems that offer different features. Those would include Linux, UNIX, and OS X.\u003cbr\u003eIn our technological age, there are operating systems in more than just computers. Many of the sophisticated new cell phones have their own operating systems, and wireless access points have their own OS to provide wireless internet to customers. In fact, the computer in a cell phone today is more powerful than a computer was twenty years ago.\u003cbr\u003eAs you can see, the operating system technology has evolved and is continuing to evolve. It seems like Microsoft is always coming out with a new and better operating system which leads people to wonder whether or not the system they are currently using is really the best one.\u003cbr\u003eIt can be confusing. But it doesn’t have to be. In the pages of this book, we’ll explore operating system in depth. You’ll learn about\u003cbr\u003ewhat they do, how they work, and what needs specific systems can meet. Ultimately, the choice is a matter of preference, but it helps to be informed on what you are really getting when choosing an OS.\u003cbr\u003eWe’ll show you operating systems uncovered, so read on!\u003cbr\u003eWHAT IS AN OPERATING SYSTEM?\u003cbr\u003eAn operating system – commonly referred to as an OS – is a set of computer programs that manage the hardware and software resources of a computer. The OS processes electronic devices with a rational response to commands that are approved by the system.\u003cbr\u003eAt the foundation of all system software, an operating system performs basic tasks like controlling and allocating memory, prioritizing system requests, controlling input and output devices, facilitating the network, and managing files. The OS can also provide a graphical user interface for higher functions. Essentially, the OS forms a platform for other system software as well as application software.\u003cbr\u003eThe operating system is the most important program that runs on a computer. Without an operating system, your computer would not work. It would not be able to process requests for print, simple calculations, or any other function. It is really the brain that runs the equipment.\u003cbr\u003eFor larger system, the OS has great responsibilities than with a PC. In larger systems, the operating system is kind of like a traffic cop. It makes sure that different users and programs running at the same time on different systems don’t interfere with each other. It also acts as a security guard making sure that unauthorized users are not able to access the system.\u003cbr\u003eThere are four classifications of a computer operating system. They are:\u003cbr\u003e• Multi-User: Allows two or more users to run programs at the same time. Some operating systems permit hundreds or even thousands of concurrent users\u003cbr\u003e• Multi-Processing: Supports running a program on more than one CPU\u003cbr\u003e• Multi-Tasking: Allows more than one program to run concurrently\u003cbr\u003e• Multi-Threading: Allows different parts of a single program to run concurrently\u003cbr\u003e• Real Time: Responds to input instantly. General-purpose operating systems, such as DOS and UNIX, are not rea","brand":"Laiftllc.com","offers":[{"title":"Default Title","offer_id":47147684528368,"sku":"2940014343084","price":0.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940014343084_p0.jpg?v=1763606921","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940014343084","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}