Bought a smartphone lately? What about a computer, T-shirt, or even a cup of Joe? Chances are, slaves made them. The Emancipation Proclamation may have abolished slavery in the United States nearly 150 years ago, but forced labor is still alive and well in the rest of the world. No matter what the brand, everything boils down to the supply chain: the people who pick and mill your cotton, mine the tungsten and gold, and harvest the coffee beans. And they're all working for you. At least 27 million bonded laborers exist worldwide, according to Slavery Footprint, a new website and mobile app that measures the role forced labor plays in supporting our lifestyles. Most of us would like to assume the answer is zero, but even the most conscientious of consumers aren't exempt—according to the calculator, this writer has 22 slaves forced to work against their will.