One of the problems some people have found with reading this document is that the terminology sometimes appears to be inconsistent. This is because the various standards that we refer to use different terms for the same concept. In general, this document uses either the ABFAB term or the term associated with the standard under discussion, as appropriate. For reference, we include Table 1 below, which provides a mapping for these different terms. (Note that items marked "N/A" (not applicable) indicate that there is no name that represents the entity.)