MINNEAPOLIS (WCCO) --Square, black and white codes are popping up all over on products, in magazines, on buildings and business cards. QR codes, or quick response codes, link the outside world to the ...

QR codes–square, dot-matrix variants of the venerable UPC–are becoming an increasingly popular way to share information such as URLs, contact details, GPS coordinates, and calendar events. The idea is ...

Pontiac engine codes, casting numbers, and date codes reveal an engine’s identity and history. Learning how to locate and interpret them can confirm whether a powerplant is factory-original or a later ...

QR codes make life easier for everyone these days, but that just means it also makes life easier for the bad guys. There may not be that many QR scams out there--yet--but it's still prudent to keep ...

Modern cars speak in codes when something’s wrong, and P0400 or P0720 can be their way of crying for help. These trouble codes point to issues in emissions or transmission systems that affect ...