tailieunhanh - Introduction to Computing (16)

CSC to Computing Lecture 16 Dr. Iftikhar Azim Niaz. ianiaz@. 1Last Lecture Summary Solid State Flash Memory Storage. q Compact Flash (CF). q Secure Digital (SD), MicroSD. q Secure Digital High Capacity (SDHC), MicroSDHC. q xD Picture Card. q Memory Stick , Memory Stick Micro (M2). q PC Card Express Card. q Smart Card. q Magnetic Strip and Microfilm 2Last Summary Enterprise Storage Cloud Drive Performance. q Average Access time. q Data Transfer Optimizing Performance. q Disk Clean UP. q Check Disk for Errors. q Defragmentation. q File Compression 3Objectives Overview. 4 System System software consists of the programs that. control or maintain the operations of the. computer and its devices. q Serves as the interface between the user, the. application software, and the computer’s hardwaren Operating Systems. q (sometimes called the platform) coordinates all. activities among computer hardware Utility Programs. q allows a user to perform maintenance-type tasks,. usually related to managing a computer, its devices,. or its programs. 5 Operating System (OS).n OS is the computers master control provides you with the tools (commands) that. enable you to interact with the When you issue a command, the OS translates. it into code that the machine can usen It ensures that the results of your actions are. displayed on screen, printed, and so onn Also acts as the primary controlling mechanism. for the computers hardware. 6 Operating 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 diskn On handheld computers and many mobile. devices such as smart phones, the operating. system may reside on a ROM Different sizes of computers typically use. different operating systems because operating. systems generally are written to run on a. specific type of computer. 7 Operating An operating system (OS) is a set of. programs containing instructions that work. together to coordinate all the activities. among computer hardware resources. 8 Operating System Functions (XP). start the computer provide a user interface manage . security manage. a. network. provide file monitor establish an Internet schedule jobs and. management and performance connection configure devices. other utilities 9Operating Systems Functions (Windows 7). 10 1. Start and Shutdown a The process of starting or restarting a. computer is called Cold Boot. q Turning on a computer that has been powered off. Warm Boot. q Using the operating system to restart a computer. that is powered on. 11 1. Star

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