This book consists of two titles, which are the following:

1 - Operating systems (OS) are like the conductors of a digital orchestra, managing hardware resources, providing a user interface, and running applications. They handle tasks like memory management, process scheduling, and file management, ensuring smooth operation of a device. Different OS types, like Windows, macOS, Linux, and mobile OS like iOS and Android, cater to various devices and user needs. Understanding their role helps appreciate how our devices function seamlessly.

2 - Website development involves creating and maintaining websites. It encompasses various aspects such as web design, web programming, and database management. Web developers use languages like HTML, CSS, and JavaScript to build the structure, style, and interactivity of websites. Additionally, they may work with server-side scripting languages like PHP, Python, or Ruby to handle dynamic content and databases. Understanding user experience (UX) and search engine optimization (SEO) are also crucial for creating successful websites.