It may be hard to believe, but ecommerce sites have been around in earnest for a little over 20 years – Amazon and eBay were both founded in 1995 (right as the Netscape and Internet Explorer browsers were debuting), preceded the year before by J.C. Penney. In 1997, Dell became the first company to land $1 million in online sales.

Twenty years later, it’s hard to imagine a world without ecommerce. Virtually anything can be, and is, bought online, to the tune of $1.2 trillion U.S. dollars globally in 2013, and an estimated $1.672 trillion in 2015. It may have started with books and music, but it encompasses pretty much everything at this point.