This document discusses different types of hardware and software used with computers. It describes hardware components like the CPU, mouse, keyboard, compact discs, floppy disks and different file formats like JPEG, GIF and PNG. It explains that the mouse is a hand-controlled device that allows activating commands on screen and serves as a connection between the user and computer, while the keyboard allows entering letters, numbers and symbols and includes alphanumeric keys, numeric keypad and function keys.