Which of the following is an example of software?

Excel is an example of software because it is a computer program that performs specific tasks, particularly related to data organization, calculations, and analysis in spreadsheet format. Software consists of coded instructions that enable the computer to perform functions and processes, which is exactly what Excel does by allowing users to create, edit, and manipulate data in a structured way.

The other options—printer, keyboard, and router—are hardware components. Hardware refers to the physical parts of a computer system, whereas software refers to the programs and applications that run on such hardware. Thus, recognizing Excel as a software application helps clarify the distinction between software and hardware.