: In technical support contexts, CP1 often stands for "Cumulative Patch 1" or "Critical Patch 1." For instance, Broadcom provides documentation for 14.3 IMPS CP1 upgrade issues and security hotfixes for Advanced Authentication 9.1 SP5 CP1 .

: It was an emergency control rod made of cadmium, designed to be pulled into the reactor by gravity to shut it down instantly in case of an emergency.

: During the famous experiment on December 2, 1942, the Zip rod was withdrawn to allow the reactor to achieve the first self-sustaining chain reaction.