Data file referenced by Adobe Acrobat, a program that allows users to create and edit .PDF files; contains user settings is typical stored in the Security folder within the Acrobat User Data directory. Acrodata files are referenced by Acrobat and should not be opened by the user. Common filenames include "directories.acrodata," " appearances.acrodata," "addressbook.acrodata," and "security-policy.acrodata."