To program an NFC tag, you will need an Android device with NFC capabilities. You will also need some NFC tags, which appear to be nothing more than a sticker on the outside, as well as an app ...

NFC tech on mobiles is set to take off in 2012, with a surge in NFC-enabled handsets. Here's our guide to using NFC tags with your Android.

In current versions of Android, however, that requires a bit of extra work with third-party apps and whatnot. In L, there's an option to do it directly from the Wi-Fi settings menu, as shown above.