As mentioned before, RFID has been around for a quite a while. That is the reason why it is already used in a lot of aspects of our everyday life... We simply do not notice it. Here are some commercial uses sorted out by frequencies. Did you know that it was RFID?
For more precision about frequencies, see the news item Definition of frequencies.

Company ID tag
|
Low Frequency:
 Pet tracking tag
| |
.
Animal identification tracking
Beer keg tracking
Automobile key-and-lock, anti theft systems
Hotel room keys
.
High Frequency:
 Race event runner ID
| |
.
.
Library book tracking
High value electronics tracking (computers, TVs, ...)
Pallet/container tracking
Access control (company ID badges)<>
Airline baggage tracking
Vending machines
Apparel item tracking
Vehicle toll tags
Race event runner ID
Cash registers
.
|
 Vehicle toll tag
|
.
UHF:
Pallet and container tracking
Truck and trailer tracking (in shipping yard)
Microwave:
Access control (vehicles)
Some other examples would be car tires, 2006 Soccer World Cup ticket, Smart Containers, Passports, Building Material...

Metro ticket
|
Thursday 21st July 2005.