Understanding the Code: A Guide to Telegram Service Symbols and A Sample Telegram from 19451945-01-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_047_1_5_21_0008The document is about Western Union symbols for different classes of service, such as Day Letter, Night Letter, Deferred Cable, and Cable Night Letter. It also includes information about filing and receiving times for telegrams and day letters. The message in the telegram is asking for support for a bill regarding salary adjustments for federal employees.