What are operating systems

Operating systems (OS) provide a set of functions needed and used by most application-programs on a computer, and the necessary linkages for the control and sychronization of the computer's hardware.

Information Technology

Information technology (IT), as defined by the Information Technology Association of America (ITAA), is "the study, design, development, implementation, support or management of computer-based information systems, particularly software applications and computer hardware." IT deals with the use of electronic computers and computer software to convert, store, protect, process, transmit and retrieve information, securely.