During the Cuban Missile Crisis, Oswald worked for a company called Jaggars-Chiles-Stovall and it was under contract to the Army's Map Service. In his address book next to the company's listing, Oswald had written the word "micro-dots." My understanding is that micro-dots is information on microfilm so small, it can be placed under a postage stamp. Maybe he was photographing maps. I don't know the answer, but the coincidences are too familiar in this case. There's too many of them, imo.