The best free PDF reader apps do more than just act as a PDF viewer - any modern browser can do that. What I'm looking for is tools that go beyond that, offering commenting, collaboration ...

pdfcpu is a PDF processing library written in Go that supports encryption and offers both an API and a command-line interface (CLI). It is compatible with all PDF versions with basic support and ...

The methodological framework we introduce here combines elements from sociolinguistics, conversation analysis ... room environment and patient outcomes are greatly expanded with the introduction of ...