Final answer:
In calendar applications like Microsoft Outlook, the Show As button in the Calendar Tools Meeting tab contains the options Busy, Free, and Out of Office, which allow a user to set their availability for others to see.
Step-by-step explanation:
The options Busy, Free, and Out of Office are found on a specific button in the Calendar Tools Meeting tab when managing appointments in calendar applications such as Microsoft Outlook. These options are part of the scheduler’s features and are typically included in the Show As button or dropdown menu. This button allows you to indicate the visibility of your time as it relates to an event on your calendar to other users. For example, 'Busy' will show your time as blocked out to others, 'Free' indicates that even though the event is on your calendar, you are still available for other activities, and 'Out of Office' signals that you are not available because you are not in the office.