This introductory book starts with the basics of programming and guides you through building a 32-bit multitasking OS with a window system from scratch in 30 days. It's designed for beginners, starting with explanations of PC mechanisms, assembly language, and C, making it easy to follow. Through trial and error, you'll learn algorithms while enjoying the process of building an OS from the ground up. This unique approach combines hobby, practicality, and learning, making it an unparalleled introduction to OS creation.