We put the best PDF editors to the test to find the top software, apps, and online services for creating, altering, and collaborating on documents. We've been testing PDF editors for over ten years ...

PDF files have become ubiquitous in our multi-platform world. This convenient file format makes it possible to view and share documents across various devices using various operating systems and ...

We list the best language learning apps, to make it simple and easy to discover a new language or improve upon your existing skills with online resources. Are you finally ready to learn a new language ...

Despite the great diversity of human languages, recurring grammatical patterns (termed ‘universals’) have been found. Using the Grambank database of more than 2,000 languages, spatiophylogenetic ...