Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. The Specification refers to the specification that it needs to meet.
PDF file specification
This used to be a really easy question to answer – Adobe. The PDF file format was invented by the co-founder of Adobe (John... In theory this is a really easy question to answer. There is a reference table to all the PDF objects in the file giving... One very powerful feature of the PDF file specification is the ability is the option to create custom font encodings. This means that for... 
