The common way of categorizing RFID tags is based on how they utilize power for communication between the reader and the tag.

The RFID stickers are designed to protrude off the side of the container as "flag tags" (shown in the picture). Please DO NOT REMOVE or tape down these ... Ensure that the barcode sticks out ...

There are two short videos after the break: a demonstration of the Tastic RFID Thief and a quick look at its guts. If you’re considering reproducing this tool and you’re picking your jaw off ...

The latest update is all about RFID and NFC ... into considerable detail about how these tags are used in the real world, and what they look like from both the outside and inside.