Headphones 2 : These are an example of an 'output device'. Headphones may be connected to the computer's sound card so you can listen to a sound file. Some headphones also have a microphone attached so you can listen and speak.
Teach-ICT.com (Information and Communications Technology), Browse by alphabet, USA 2015. http://www.teach-ict.com/glossary/E/ergonomics.htm , (Info and Commun Tech - Amer) {736}