… is usually written in high-level programming languages that are easier and more efficient for humans to use than machine language.

A user interface that enables users to easily interact with application programs (and with the operating system itself) by using windows, buttons, menus, … , the mouse, and the keyboard.

… programs are programs that people use to get their work done.

The … does all the processing and controls all the other devices in the computer system.

Hard … are used for the permanent storage of information.

When a particular program is run, the data is … by the computer very rapidly.

Original programs were … in a high-level language.

The main device for inputting the data is a typewriter- style … .

Some operating systems have graphical (user) … that allow the computer user to select items from menus.

A Trojan horse is a … that appears to do one thing while actually doing something else.