System software- Consists of the programs that control or maintain the operation of the computer and Its devices. Operating systems- is a set of programs containing instructions that work together to coordinate all the activities among computer and mobile device hard ware. Start and shut down a computer or mobile device- If a computer or mobile device Is off, you press a power button to turn It on. Provide a user Interface Manage programs Manage memory Coordinate tasks Configure devices Establish an Internet connection Monitor performance
Provide file management and other device or media related tasks Updating operating system software Control a network Administer security Booting Process Kernel- the core of an SO that manages memory and device maintains the computer’s clock, start programs and assigns the computer resources. Memory resident- it remains in memory while the computer is running. BIOS (basic input/output system)- Firmware that contains the computers start up instructions. Peer-on self test(Post)- The tests that check the various system components. Make sure the computer hardware is connected properly and operating correctly.
COSMOS Chip- Stores infatuation information about the computers such as the amount of memory; type of disk drives, keyboard, and monitor , the current date and time; a other startup information. Operating System Functions A boot drive Is the drive from which your computer starts You can boot from a boot disk A recovery disk contains a few system files that will start the computer Includes various power options Sleep mode saves any open documents running programs or APS to memory, turns off all unneeded functions, and then places the computer in a low-power state.
Hibernate saves any open documents and running programs or APS to an internal art drive before removing power from the computer or device. A user interface(LU) controls how you enter data and instructions and how information is displayed on the screen . With a graphical user interface (GU’), you interact with menus and visual images. How an operating system handles programs directly affects your productivity. Single tasking and multitasking Foreground and background Single user and multiuse Single user/ single tasking operating System – Allows only one user to run one program at time.
Single user/multitasking operating system- Allows a single user to operating system- Enables two or more users to run programs simultaneously. Multiprocessing Operating System- Supports two or more processors running programs at the same time. Memory management optimizes the use of the computer or device’s internal memory Virtual memory- is a portion of a storage medium functioning as additional Ram Page- The amount of data and program instructions that can swap at a given time.
Paging- Technique of swapping items between memory and storage Time-consuming process Trashing- when SO spend to much time paging instead of exciting application software. The operating system determinate the order in which tasks are processed. Buffer- is a segment of memory. Spooling- the process that sends documents to be printed to a buffer instead of sending them immediately to the printer. A driver- is a small program that tells the operating system how to communicate with a specific device. Plug and Play automatically configures new devices as you install them.
Operating systems typically provide a means to establish Internet connections. A performance monitor- is a program that assesses and reports information about various computer resources ND devices. Operating systems often provide users with a variety of tools related to managing a computer, its devices, or its programs File Manager Search Image Viewer Installer Disk Cleanup Disk Defragmenter Screen Saver File Compression PC Maintenance Backup and Restore Automatic update- automatically provides new features or corrections to the program.
Some operation systems are designed to work with a server on a network The multiuse operating systems allow multiple users to share a printer, Internet access, files, and programs. A network administrator uses the server operating yester to: Add and remove users, computers, and other devices Configure the network, install software and administer network security. A user account enables a use to sign in to or access resources on, a network or computer A user name, or user ID, identifies a specific user A password is a private combination of characters associated with the user name.
A desktop operating system- is a complete operating system that works on desktops, laptops, and some tablets Windows Mac SO UNIX- is a multitasking operating system developed in the early sass Linux-is a popular, multitasking UNIX- based operating system Chrome SO- is a Linen-based operating system designed to work primarily with web APS Server Operating Systems Windows Server UNIX Linux The operating system on mobile deices and many consumer electronics is called a mobile operating system and resides on firmware.