The document summarizes different input and output devices for computers. It lists mouse, keyboard, microphone, optical pen, and webcam as input devices, and monitor, speakers, printer, and headphones as output devices. It also mentions hard disk and CD-ROM as storage devices. The document was created by Dayana Cadena for a class taught by Jairo Inagan using Camtasia Studio software in San Juan de Pasto, Colombia in 2011.