Hardware & software
Hardware is anything that you can physically touch that make up a computer system. Some common examples are key boards, mouse's, and the monitor itself, these are used everywhere!. Inputs are microphones, keyboards again and touchscreens. Some outputs are, speakers, printers and headphones. these are used in a daily office, schools, or just generally at home.
Software is any content on the computer. Like Microsoft word, Your albums, pictures. Anything you have downloaded or that have came with the device you have. A program is a series of instructions that cause the computer to behave in a pre-determined way. An operating system is a program that manages all the different programs that you download. It is the basics of the computer system.