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.

It’s been more than 25 years that PDF files have been around, and they’re not going anywhere anytime soon. As PDFs are the most popular format for presentations and document sharing, they are heavily ...

Whether you're on an iPhone, Android phone, Mac or PC, I found free and easy ways to add text, sign documents and fill out forms. Patrick Holland has been a phone reviewer for CNET since 2016. He is a ...