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Understanding Operating Systems: Functions, Interfaces, and File Management, Study notes of Computer Science
An introduction to operating systems (os), their functions, user interfaces, and basic file management in various operating systems such as windows, unix, and dos. Students will learn about the role of an os in managing processes, resources, and providing security.
Typology: Study notes
Pre 2010
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Objectives
Learn what an operating system is
Become familiar with the different types of operatingsystems - Identify the major functions of an operating system - Understand how operating systems manage processes
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Why You Need to Know About...
Operating Systems
Operating System(OS): mediates all activity withincomputer
System knowledge improves efficiency - Practical skills easily acquired - Demonstrate basic folder and file functions
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What Is an Operating System?
OS: software control center
- Resident in main memory (RAM) – Interfaces user, applications, hardware with CPU
Supervises and facilitates program execution • Connects hardware to CPU with device drivers
Common brands: Microsoft Windows, UNIX, Linux,Mac OS
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What Is an Operating System?
(continued)
OS has (2) main program regions
Kernel: system core loaded at boot time by BIOS – Modules: components provide user/device interface
Platform: OS fitted to a particular CPU - Cross-Platform application: runs on multiple platforms
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Types of Operating Systems
(continued)
OS design parameters tailored to customer base
- Microsoft Windows and Mac OS appeal to home and small business users - User-friendly interfaces and multimedia capabilities - UNIX often the OS of choice in the server environment - Stability, multitasking, security, multiprocessing - Every multipurpose device with CPU must have an OS - Desktops, clients, servers, PDAs, cell phones, appliances
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Functions of an
Operating System
All operating systems perform four basic functions:
- Provide a user interface – Manage processes – Manage resources – Provide security
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Provide A User Interface
(continued)
Example interfaces
- GUI: Microsoft Windows and Mac OS – Command-line (console window)
- Standard UNIX (can be fitted with GUI) • DOS (disk operating system): MS console OS
- Windows backwardly compatible with DOS
- Standard UNIX (can be fitted with GUI) • DOS (disk operating system): MS console OS
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Connecting with Computer Science