The document introduces computers and their basic components. It defines a computer as consisting of both hardware and software that are interdependent. It describes common hardware components like the motherboard, CPU, RAM, and ROM. It explains that the motherboard controls computer operations and has the CPU and memory, while the CPU is the brain that acts as the control unit. It also defines RAM as temporary storage and ROM as permanent storage. Finally, it states that a mouse is a pointing device and a monitor is the screen that displays the user interface.