In todays modern world theres hardly anyone who is not familiar with the pair of silver, oval metal tags worn by soldiers and servicemen both now and in eras past. The common, familiar name for theses identification tags is dog tag because of their resemblance to the actual licensing disks worn by dogs (Recently, the army stopped calling the tags "Dog tags" and adopted the more civilized moniker "I.D tags". It has been suggested that some enlisted trainees in the 1990s complained that the term "dog tag" was offensive, but this reasoning has never been confirmed.).