They also didn't define DTLB, ALU, or CPU for that matter. I thought it was a good choice. They were assuming deep familiarity with modern CPU architectures th

They also didn't define DTLB, ALU, or CPU for that matter. I thought it was a good choice. They were assuming deep familiarity with modern CPU architectures through the whole text, so a one-sentence definition of all the terms would either have been too much, or not enough, depending on the reader.