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Not very techy, one might think. On two fronts, I keep this with me at all times in my on-the-go bag because without it I can't get on a flight to where I need to be. That's a given -- sure -- but it also acts as age identification for when I'm abroad. Some countries still have antiquated laws when it comes to buying over-the-counter drugs, such as headache tablets, or buying liquor.
The more interesting part is the chip in the back of the passport. Where it has my nationality and pretty mugshot, the plastic laminated chip-laden page allows me to walk back through the U.K. border using e-passport gates -- unmanned, automated barriers to re-enter the country -- which is particularly useful during peak-times, such as the Olympics.