Your smartphone already carries a capable barcode and QR code scanner, tucked into tools you probably open every day. With a couple of taps, you can turn the camera ...

Amazon has released an updated version of its iPhone app which lets you search for items by scanning their barcodes with your phone’s camera. That means you can walk through a store, pick up an item, ...

A longtime consulting engineer who now works for the federal government saw our discussion of mnemonics for remembering the resistor color code. He shares one he learned in college. It goes “Budweiser ...