Japan Post Co. on Monday introduced seven-digit codes using alphanumeric characters to replace home addresses for services such as online shopping. Under the new service, a so-called "digital address" ...

We produce Mifare EV1 RFID tags and need to convert the UID to a seven-digit code printed on a wristband. Does anyone have a formula to convert the UID to a seven-digit code using numbers and letters?

No, not every traveler needs one — but here's how to find out if you do. Carlina Teteris/Getty Images When you book a flight online, there's quite a bit of information you need to provide, from your ...