This document discusses the need for common terminology when explaining new concepts. It presents several acronyms used in digital spaces - CATP (Caffeine Access Transport Protocol), MOO (Mud, Object Oriented virtual world), and Veronica (search engine for the Gopher protocol) - and provides explanations for what they stand for to establish a shared frame of reference. The overall message is that defining unfamiliar terms is important for effective communication across different knowledge domains.