Invented by Adobe Systems over 20 years ago, the Portable Document Format (PDF) is now an open standard for electronic document exchange maintained by the International Organization for Standardization (ISO). When you convert documents, forms, graphics, and web pages to PDF, they look just like they would if printed.
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PDF files sometimes reference external resources such as images or other documents. To increase portability and ease archival of such PDF files, these resources... Digital signatures are a stamp of authentication for digital information. For PDF files, they provide the ability to detect whether the document has been... Can you determine if a PDF is searchable for text without opening it? Well you will need some special software. This might be useful... To show how to read a PDF file, I have created a step by step guide to reading very ‘simple’ PDF (it just shows... What exactly is a PDF form? A PDF form is an electronic document in Portable Document Format (PDF) which has interactive fields that let... PDF files sometimes contain objects which are never used. This increases the file size and is wasteful. This tutorial shows you how to reduce... 
