ITT: people who disagree because searches for "vector" and "matrix" is going to be overly encumbered with mathematical references because they don't understand how SEO works.

Only a single search engine hit on the first page resolves in the mathematical definition of matrix. The others include the movie franchise, a hair products company, several dictionary pages, a computer warehouse, a vehicle tracking device, and several other non-math refrences to the word matrix. On google, riot.im shows up at #26 for me.