How Important Is Acrobat 5?--McIlroy

But with each new release of the software, more and more of PDF's inherent strengths shone through, and electronic adoption expanded. By Acrobat 4, PDF had reached a kind of critical mass, and now the electronic usage of PDF (newly christened by Adobe as the "ePaper" market) turned Acrobat into a $100 million business. In other words, a big hit.