01146cam a2200313 4500 544106748 TxAuBib 20030909120000.0 040203s2004||||||||||||||||||||||||eng|u 2002153685 9780823939657 lib. 0823939650 lib. KyBuM KyBuM TxAuBib Rosenberg, Aaron. Cryptologists : life making and breaking codes / Aaron Rosenberg. New York : Rosen Central, 2004. 64 p. : ill., col. photos. ; 22 cm. Extreme careers Includes index. Includes glossary. Includes bibliographies. This book examines the careers available in the field of cryptology, discussing the necessary education, training, and on-the-job duties. 4-8 Medialog, Inc. Accelerated Reader AR Middle Grades 7.2 1 quiz: 73403 disk(s): AQ402. 20030909. Cryptography Vocational guidance. Extreme careers. TXSTN