Standardizing Notices were RCA's official manufacturing instructions. They were very carefully kept up-to-date through a document control system, and were distributed under strict control, since these were the "crown jewels". Nearly all the Standardizing Notices at this site were given to GE under licensing agreements, and were not kept up-to-date. Since these came from GE's CRT Department, they all are for specific CRT designs or processes related to them. Standardizing Notices are hierarchical, with top level pages refering to details on lower-level pages.