The answer is D - A user-friendly computer program that allows the user to point and click on icons to make the computer function.
The answer to the fill in the blank is a USB
These are called abstractions. They can be created by functions, if statements, or on event structures.
The process that determines how bits are represented on the medium is called encoding. It is the process of converting a certain data into a particular format that is required for a certain processing need like program execution, data transmission or file conversion.