IRIW stands for "independent reads of independent writes". IWP stands for "Intel white paper". The submitted article (published in CACM) is a less formal and

IRIW stands for "independent reads of independent writes". IWP stands for "Intel white paper". The submitted article (published in CACM) is a less formal and condensed form of https://www.cl.cam.ac.uk/~pes20/weakmemory/x86tso-paper.pdf https://www.cl.cam.ac.uk/~pes20/weakmemory/x86tso-paper.pdf which does, in fact, define all of its acronyms and include examples numbered n1 through n8.