Like the GIF (that's Graphics Interchange Format), the PDF (Portable Document Format) has survived and flourished through the digital age. That's partly because of its versatility: It's the go-to ...

Portable document format (PDF) files remain a popular choice for business documents ranging from contracts and forms to manuals and reports, so there's a good chance you need to open them often.

Answer by Alan Wootton, I wrote the first version of Acrobat, at Adobe, in the 90's, on Quora, I was there for the whole thing. It was the 90's and Adobe was doing well. In addition to the Systems ...