Which category of software includes programs such as word processors and PDF document readers?

Application software encompasses programs designed to allow users to perform specific tasks, such as creating documents, managing spreadsheets, or reading PDF files. Word processors like Microsoft Word enable users to write, edit, and format text documents, while PDF readers allow for the viewing and annotation of Portable Document Format files. This category is distinguished by its focus on directly serving the end user's needs, in contrast to other categories of software which serve different functions.

Utility software, for instance, includes programs that help maintain or optimize a computer, such as disk cleanup tools or antivirus software, and does not focus on task performance by the user in a direct manner. System software, like operating systems (e.g., Windows or macOS), manages hardware resources and provides a platform for application software to run, rather than being geared toward specific user tasks. Development software refers to tools used by programmers to create software applications, such as integrated development environments (IDEs) or compilers, which again, do not meet the direct user productivity needs that application software does.