PDF is a 'read-only' document which is designed in such a way that cannot be edited & if a user tries to edit the PDF file then you will see a footprint. It also meets the requirements in the court of law. PDF is a 'read-only' document which is designed in such a way that cannot be edited & if a user tries to edit the PDF file then you will see a footprint. It also meets the requirements in the court of law. Additionally, no extra hardware is required to access PDF documents. The file format is one of the most secured document type too, as it enables users to set password protection before sharing their PDF files over internet. Acrobat Reader is freely available software which is used to open and access PDF documents, thus making it most used file format. And due to its trustworthiness, even the Government also uses PDF as its official document format.
U.S. Federal Government is also another largest user of PDF, which makes it a long term format. Compression is another advantage offered by PDF. Sending a file full of papers would be a nightmare; but not with PDF, which compresses the file for easy and quick transfer.