The etymology of "soccer"

I'm embarrassed that I didn't already know, but I learned the etymology of the word from a series of tweets written by Gavin Hamilton, the editor of the British publication World Soccer:

A podcast from the US Embassy in London further explains:
For obvious reasons, in the 1880s and 1890s, English newspapers couldn't use the first three letters of Association as an abbreviation in their pages, so they took the next syllable, S-O-C. With the British penchant for adding "-er" at the end of words: punter, footballer, copper, and, of course, nicknaming rugby, "rugger," the word "soccer" was soon born, over a hundred years ago, here in England, the home of soccer. We adopted it and kept using it because we have our own indigenous sport that we call football.