The document provides information about basics of computer hardware and software. It defines hardware components like the monitor, keyboard, mouse, printer, speakers and internal components like the CPU, motherboard, RAM and graphic card. It also explains system software like operating systems for desktops, mobiles and application software. It lists different types of file extensions for video, audio, images and text files. It provides instructions for tasks like taking screenshots, formatting text, saving documents as PDF and installing/uninstalling software.