I had been reading about speeding up game programs by taking advantage of cache lines. Also, I've been reading "IBM's 360 and Early 370 Systems" and came upon

I had been reading about speeding up game programs by taking advantage of cache lines. Also, I've been reading "IBM's 360 and Early 370 Systems" and came upon the initial development of cache. You'd think that the initial cache would fetch and store a word, but it didn't. It grabbed a block of words. In other words, a cache line. In 1968.