IT is the use of computers, networking, storage, and other technologies to process and store data.

Major branches include software development, cybersecurity, networking, data science, and IT support.

Hardware is the physical components of a computer, while software is the set of instructions that tell the hardware what to do.

An OS is system software that manages computer hardware, software resources, and provides common services for applications.

Management is the process of planning, organizing, leading, and controlling resources to achieve specific goals.

Planning, organizing, leading, and controlling are the core functions of management.

There are three levels: top-level, middle-level, and operational-level management.

Project management involves planning, executing, and monitoring a project to meet specific goals within a given timeframe.