Historically, a DD217 was a wallet-sized document—a certificate of service—used by the U.S. military to show a service member’s name, rank, and discharge details, which was largely phased out in the 1960s.
A 1943 document titled "U.S. Radar - Operational Characteristics of Available Equipment Classified by Tactical Application" was classified as "SECRET" and registered under the code FTP 217. 2. Academic Coursework (HIS 217 - SNHU)
To give you the most relevant information, could you clarify:
Based on the search results, there is no single, widely recognized public file or common, standard document explicitly named "217.rar".