�ݺ�ߣ

Xkcd is a popular web comic that covers topics like romance, sarcasm, math and language. It has no phonetic pronunciation for its name and guards its four character name. Some of its comic strips are about the identity matrix, angular momentum, reloading, protesting Wikipedia, traveling west, rings, the traveling salesman problem, music, knowledge, Schrodinger's cat, sandwiches, and the answer to life, the universe, and everything being xkcd. Readers are encouraged to check it out at its website.Read less