Which is not an item of hardware?

Which of the following is not an example of hardware?

Hardware devices that are not part of the main computer system, and are often added later to the system are ..............

A computer cannot "boot" if it does not have the ......... 

Programs designed specifically to address general-purpose applications and special-purpose applications are called ..........

What is the name for the process that is used to convert a series of instructions or programs, written in a high-level language into instructions (or a program) that can be run on a computer?

Which of the following peripheral devices displays information to a user?

An assembler is used to translate a program written in .........

The capability of the operating system to enable two or more than two programs to execute simultaneously in a single computer system by using a single processor is ............

A program which helps create written documents and lets you go back and make corrections as necessary ............