Errata
Beginner
A published list of known mistakes in a chip, with tips for working around them.
Novice
A document listing the known bugs in a chip version that has shipped, what triggers each one, and how to avoid it, usually with a change in software or firmware.
Expert
Each erratum records a decision not to fix the silicon yet. Workarounds range from driver and compiler changes to microcode or configuration patches; a later revision of the chip may fix them.