The constantly growing demands on formats were no longer able to meet the constantly growing requirements for reliable long-term digital storage of important documents. In addition, there was a desire for a searchable, compact format that was robust and widely usable across platforms. In 2005, an ISO standard based on the PDF format started to write a new chapter in the history of digital archiving of documents: PDF/A. In this blog post, Dietrich von Seggern from callas software is writing about how system-independent archiving of project files with PDF/A-3 can be achieved and how the advantages of PDF/A-3 are presented in the form of application scenarios and the different points of view regarding PDF/A-3: https://www.callassoftware.com/de/blog/system-independent-archiving-of-project-files-with-pdf-a-3