Lecture Content Operating System Today s Operating Systems File Basics File Management Application Software Operating Systems and File Management 2
Operating Systems and File Management 3
Operating System A software that acts as the master controller for all activities that take place within a computer system Operating Systems and File Management 4
Operating System Activities 5
Operating System Activities Multitasking - provides process and memory management that allow two or more tasks to run simultaneously Multithreading - Within a single program, allows multiple parts to run simultaneously Multiprocessing - supports a division of labor among all the processing units 6
User Interfaces The combination of hardware and software that helps people and computers communicate with each other 7
User Interfaces Menus, submenus, and dialog boxes 8
The Boot Process During the boot process, the operating system is loaded into RAM Your computer s small bootstrap program is built into special ROM circuitry housed in the computer s system unit 9
Operating Systems and File Management 10
Today s Operating Systems Microsoft Windows Mac OS UNIX and Linux DOS Handheld Operating Systems Operating Systems and File Management 11
Microsoft Windows Operating Systems and File Management 12
Mac OS Mac OS X interface includes all the standard elements of a User Interface (GUI), including icons, menus, windows, and taskbars. 13
UNIX and Linux Several Web sites offer a Linux distribution, which is a package that contains the Linux kernel, system utilities and applications (i.e., UBUNTU) Several graphical interfaces can be chosen. Here is KDE graphical desktop. 14
DOS Disk Operating System First operating system 15
Handheld Operating Systems 16
Operating Systems and File Management 17
File Can be considered as the evolution of the paper documents Paper documents are kept in files, stored in folders COLLECTION OF RELATED INFORMATION Operating Systems and File Management 18
Directories and Folders A way of organizing files and other directories Operating Systems and File Management 19
File Names and Extensions You must adhere to file-naming conventions when saving files Maximum length Prohibited characters No reserved words Case sensitivity File extensions are usually related to the file format Native file format Operating Systems and File Management 20
File Directories and Folders An operating system maintains a directory for each disk, tape, CD, DVD, or USB flash drive Root directory Subdirectory Depicted as folders A computer s file location is defined by a file specification, or path d:\courses\for201\beethoven - Symphony No5 1 Mov.mp3 d:\courses\for201\for201.jpg Operating Systems and File Management 21
File Formats A particular way to encode information stored in a computer file. Paint (Windows XP) 22
File Formats To convert a file from one format to another open it with an application that supports both formats (i.e., Paint). Then use the Save As dialog box to select an alternative file format. 23
File Management - Overview Application-based File Management File Management Utilities File Management Metaphors Windows Explorer File Management Tips Physical File Storage Operating Systems and File Management 24
Application-based File Management Applications typically provide a way to open files and save them in a specific folder on a storage device (such as Word or Excel) 25
Application-based File Management The Save As dialog box not only helps you name a file and designate its destination, but.. allows you to rename files, delete files, create folders, and rename folders. 26
File Management Utilities File management utilities show you the files stored on your disks Ex. Windows Explorer 27
File Management Metaphors Storage metaphors help you visualize and mentally organize the files on your disks Logical storage models 28
Windows Explorer Windows Explorer makes it easy to drill down through the levels of the directory hierarchy to locate a folder or file. 29
Windows Explorer Windows Explorer allows you to manipulate files and folders in the following ways: Rename Copy Move Delete 30
File Management Tips Use descriptive names Assign short names to files or directories Maintain file extensions Group similar files Organize your folders from the top down Do not mix data files and program files 31
Software Categories Computer Software 33
Application Software Any application software that has the potential to help people do their work more efficiently Groupware is designed to help several people collaborate on a single project using local networks or Internet connections 34
System Software - Utility Software Utility software is designed to help you monitor and configure settings for your computer system equipment, the operating system, or application software A desktop widget is a specialized utility program that appears on a computer s screen-based desktop Computer Software 35
System Software - Device Drivers A device driver is software that helps a peripheral device establish communication with a computer Windows Device Manager Computer Software 36
Popular Applications Document Production Software Spreadsheet Software Number Crunching Software Database Software Graphics Software Computer Software 37
Popular Applications Music Software Video Editing and DVD Authoring Software Educational and Reference Software Entertainment Software Business Software Computer Software 38