In Three Days of the Condor, there's a scene where Robert Redford's character calls someone on the phone and requests a "CNA". Does anyone know what CNA stands for in this context?
WOMAN'S VOICE (FILTER) CNA, Mrs. Coleman speaking. TURNER (into test-set) This is Harold Thomas, Mrs. Coleman, Customer Service. CNA on 202 555-7389, please. WOMAN'S VOICE (FILTER) One moment, please.
(Here's a transcript of the scene in question: http://www.cswap.com/1975/Three_Days_of_the_Condor/cap/en/25fps/a/01_25)