Introduction to Operating Systems

This lecture introduces the importance of operating systems, explaining why they are essential, how they are designed, and their implications. It covers the omnipresence of operating systems in various devices and programs, emphasizing their impact on performance and execution behavior. The lecture delves into the challenges of designing operating systems, including communication across devices, Bell's law, computer performance trends, and the increasing complexity of hardware. It also explores the role of operating systems as illusionists, providing abstractions for hardware resources, and as referees, managing fault isolation and resource sharing. Additionally, it discusses the basics of operating systems, such as program execution, process abstraction, and the OS's view of the world.

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CS-323: Introduction to operating systems

Introduction to basic concepts of operating systems.

Communication is usually defined as the transmission of information. The term can also refer to the message itself, or the field of inquiry studying these transmissions, also known as communication studies. The precise definition of communication is disputed. Controversial issues are whether unintentional or failed transmissions are included and whether communication does not just transmit meaning but also create it. Models of communication aim to provide a simplified overview of its main components and their interaction.

Within the realm of communication studies, organizational communication is a field of study surrounding all areas of communication and information flow that contribute to the functioning of an organization . Organizational communication is constantly evolving and as a result, the scope of organizations included in this field of research have also shifted over time. Now both traditionally profitable companies, as well as NGO's and non-profit organizations, are points of interest for scholars focused on the field of organizational communication.

Interpersonal communication is an exchange of information between two or more people. It is also an area of research that seeks to understand how humans use verbal and nonverbal cues to accomplish a number of personal and relational goals. Interpersonal communication research addresses at least six categories of inquiry: 1) how humans adjust and adapt their verbal communication and nonverbal communication during face-to-face communication; 2) how messages are produced; 3) how uncertainty influences behavior and information-management strategies; 4) deceptive communication; 5) relational dialectics; and 6) social interactions that are mediated by technology.

Communication studies or communication science is an academic discipline that deals with processes of human communication and behavior, patterns of communication in interpersonal relationships, social interactions and communication in different cultures. Communication is commonly defined as giving, receiving or exchanging ideas, information, signals or messages through appropriate media, enabling individuals or groups to persuade, to seek information, to give information or to express emotions effectively.

In computer science, the computational complexity or simply complexity of an algorithm is the amount of resources required to run it. Particular focus is given to computation time (generally measured by the number of needed elementary operations) and memory storage requirements. The complexity of a problem is the complexity of the best algorithms that allow solving the problem. The study of the complexity of explicitly given algorithms is called analysis of algorithms, while the study of the complexity of problems is called computational complexity theory.

Processes: Overview and Management CS-323: Introduction to operating systems

Covers the basics of processes in operating systems, including creation, memory layout, state transitions, virtualization, APIs, and program execution.

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Process Protection and Efficient Execution CS-323: Introduction to operating systems

Explores process execution, protection, and efficient OS mechanisms for secure and reliable multi-program environments.

File Handling in C: Basics and Common Issues ME-213: Programmation pour ingénieur

Covers the basics of file handling in C, common issues, and standard functions.

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Covers the creation of processes, switching between them, handling interrupts, and the context switch mechanism in the multiprocessor world.