Disk Operating System : (ICT) This is quite often referred to as the acronym DOS. This is the operating system used by the original IBM PC and many other early computers. It uses a command line interface
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}