PFC is the file format of American Online application and stands for Personal Filing Cabinet. The file stores emails, contact info, phone number, company info and much more. This filing system enables the users to read their mails even in offline. The AOL PFC file format can be opened only by AOL software, no manual method is applicable. Apart from AOL, there are other applications that use PFC file type such as, Pegasus Mail, Corel WordPerfect and Presto.