A PDF file is an abbreviation of the term Portable Document Format. This file format is suitable for free and easy document and file exchange because of its open-standard nature. It is a file format developed by the Adobe Systems company and it has been very popular and widespread since its introduction in 1993. A PDF file can be protected or encrypted with a password or it can contain embedded restrictions regarding copying and editing. If you want to save or edit a protected PDF file, you have to know how to copy it first. Tips Warnings Writer Bio
