The document provides an overview of operating systems, including what an operating system is, its history, modern functionality, and recent developments. Key points include:
- An operating system interacts between the user and hardware, providing services like file systems, scheduling, networking, and memory management.
- Operating systems have evolved from early batch processing systems when hardware was expensive to modern interactive timesharing systems and personal computing as hardware costs decreased.
- Recent developments include parallel operating systems for tightly coupled multiprocessor systems, distributed systems for loosely coupled networks, real-time systems for meeting deadlines, and mobile operating systems.
An interface between users and hardware - an environment "architecture”
Allows convenient usage; hides the tedious stuff
Allows efficient usage; parallel activity, avoids wasted cycles
Provides information protection
Gives each user a slice of the resources
Acts as a control program.
An interface between users and hardware - an environment "architecture”
Allows convenient usage; hides the tedious stuff
Allows efficient usage; parallel activity, avoids wasted cycles
Provides information protection
Gives each user a slice of the resources
Acts as a control program.
INTRODUCTIONTO OPERATING SYSTEM
What is an Operating System?
Mainframe Systems
Desktop Systems
Multiprocessor Systems
Distributed Systems
Clustered System
Real -Time Systems
Handheld Systems
Computing Environments
Unleash the Power of Your Computer with a Deep Dive into Operating Systems
Explore the hidden world of operating systems, the software maestros that orchestrate your computer's resources. This presentation delves into:
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SIMPLE STRUCTURE
It is the most straightforward operating system structure, but it lacks definition and is only appropriate for usage with tiny and restricted systems. Since the interfaces and degrees of functionality in this structure are clearly defined, programs are able to access I/O routines, which may result in unauthorized access to I/O procedures.
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Instructions for Submissions thorugh G- Classroom.pptx
Lecture 1 introduction to operating systems
1. OPERATING SYSTEMS
T S Pradeep Kumar
VITCC
http://www.pradeepkumar.org
Lecture 1
2. OVERVIEW
What is an Operating System
History of Operating system
Modern OS Functionality
Recent Developments in OS
3. WHAT IS AN OPERATING SYSTEM
Interacts
USER
Hardware
4. SERVICES
Tasks
CPU
File System
Scheduling
OS
services
Networking Memory
5. COORDINATION
Coordinates
multiple
applications and
processes in a fair
manner
6. GOAL
The goal in OS
development is to
make
the machine
convenient to use
(a
software engineering
problem) and
efficient (a system
engineering
problem)
10. HISTORY
Phase 0 – Hardware is very expensive, no
OS exists
One User console
Uses Card Deck to load programs
11. HISTORY
Phase 1 – Hardware is expensive, humans are
cheap
Simple batch processing: load program, run, print
results, dump, repeat
Overlapped CPU and IO Operations
Multiprogrammed Batch Systems
Phase 2 – Hardware is less expensive than
before, still humans are expensive
Interactive timesharing
Unix
12. HISTORY
Phase 3 – Hardware is very cheap, humans
are cheap
Personal Computing
13. RECENT DEVELOPMENTS
Parallel Operating Systems
Shared memory and clock, more tightly coupled
systems
Distributed OS
No shared memory or clock, less no of loosely
coupled systems
Real Time OS (RTOS)
Meeting deadline constraints
14. RECENT DEVELOPMENTS
Mobile OS
Symbian, Meego, Android, iOS…..
Surface OS
Click this to see a video