.PGP File Extension

Security key or digital signature file that verifies a user's identity; used for decrypting a file encrypted with Pretty Good Privacy (PGP) software; ensures that protected files can only be opened by authorized users.

File used by AutoCAD, an engineering design and documentation CAD application; contains external command definitions, which allow users to run custom commands in AutoCAD; can be used for running external programs and Windows commands through the AutoCAD interface; also used for defining aliases, or shortcuts, for commands with verbose syntax.

PGP files are stored by default in a file named acad.pgp. They are stored in plain text and contain commands in the following format:

command,[executable],flags[,[*]prompt[,return_code]]

Each command specifies the command alias, an executable to run, process flags, display prompt options, and a return code when the command finishes.