This module covers fundamental areas of operating systems that underpin much of the technology of the internet age. We will emphasize both on design issues and fundamental principles in contemporary systems and get a solid understanding of the key structures and mechanisms of operating systems by focusing on Unix based Operating Systems and Windows. We will examine the software components that run current devices, and how they support user operations. Through a popular Linux distribution you will gain practical experience in Unix and Unix scripting, which is an important technology that, running on servers, underpins much of the modern computational infrastructures. Additionally, you will get to practical experience on Windows command line, named Powershell to understand the similarities and differences between the two dominating operating systems.