Which of the following is NOT an application of computer software?

The correct answer identifies "setting up hardware" as not being an application of computer software. This is because setting up hardware typically involves the physical installation, configuration, and management of physical components like computers, peripherals, and other electronic devices. It requires knowledge of hardware components and connectivity rather than the use of software applications.

On the other hand, word processing, spreadsheet programs, and editing documents are all tasks that heavily involve software applications. Word processing software is specifically designed for creating and editing text-based documents, while spreadsheet programs facilitate functions like data organization, calculation, and analysis through graphical interfaces. Editing documents is an inherent function of word processing software, further highlighting how these tasks are software-driven rather than hardware-related.