Which of the following tasks is NOT associated with processing information?

Greeting callers is a task primarily focused on interpersonal communication rather than processing information. This action involves welcoming individuals and directing them appropriately, which does not require the manipulation or assessment of information in the same way that the other tasks do.

In contrast, editing and proofreading, opening and reviewing incoming communications, and preparing outgoing communications all involve activities that require attention to detail, critical thinking, and the assessment of written information. These tasks entail checking for accuracy, clarity, and conciseness, as well as formulating responses or disseminating information effectively. Therefore, while greeting callers is an important aspect of administrative duties, it is distinct from the information processing tasks listed in the other options.