As smartphones have become more and more ubiquitous, so have QR codes. These maze-looking squares are a type of matrix bar code that contains data — usually, QR codes point to a website or open a ...

Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go. By J. D. Biersdorfer I write the monthly Tech Tip column, which is devoted to ...