TAILIEUCHUNG - Lecture Introduction to computing - Lecture 16

Computer users have several choices when it comes to operating systems, although the choice is not always easy. The vast majority of new PCs are sold with some version of Windows installed, but many users are choosing to run UNIX or Linux. Apple Macintosh computers and the proprietary Mac OS have a small but important share of the desktop OS market. This lesson is a survey of the primary operating systems used on personal computers and network servers today, describing the basic features of each. | CSC 101 Introduction to Computing Lecture 16 Dr. Iftikhar Azim Niaz ianiaz@ 1 1 Last Lecture Summary I Solid State Devices Flash Memory Storage Compact Flash (CF) Secure Digital (SD), MicroSD Secure Digital High Capacity (SDHC), MicroSDHC xD Picture Card Memory Stick , Memory Stick Micro (M2) PC Card Express Card Smart Card Magnetic Strip and Microfilm 2 2 Last Summary II Enterprise Storage Devices Cloud Storage Drive Performance Average Access time Data Transfer Rate Optimizing Performance Disk Clean UP Check Disk for Errors Defragmentation File Compression 3 3 Objectives Overview System Software System software consists of the programs that control or maintain the operations of the computer and its devices Serves as the interface between the user, the application software, and the computer’s hardware. Operating Systems (sometimes called the platform) coordinates all activities among computer hardware resources Utility Programs allows a user to perform maintenance-type tasks, usually related to managing a computer, its devices, or its programs Operating System (OS) OS is the computer's master control program provides you with the tools (commands) that enable you to interact with the PC When you issue a command, the OS translates it into code that the machine can use. It ensures that the results of your actions are displayed on screen, printed, and so on. Also acts as the primary controlling mechanism for the computer's hardware. Operating System Although an operating system can run from an optical disc and/or flash memory mobile media, in most cases, the operating system is installed and resides on the computer’s hard disk. On handheld computers and many mobile devices such as smart phones, the operating system may reside on a ROM chip Different sizes of computers typically use different operating systems because operating systems generally are written to run on a specific type of computer Operating Systems An operating system (OS) is a set of .

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