Information technology (IT) is the use of computer systems or devices to access, store, manage, and protect information. It is a field of expertise that includes a wide range of subfields and ...

A central processing unit, or CPU, is the heart of any computer system. But it’s definitely not the only part: you also need RAM, ROM and at least some peripherals to turn it into a complete system ...

A broad survey of the computer science discipline, focusing on the computer's role in representing, storing, manipulating, organizing and communicating information. Topics include hardware, software, ...