Occupational Outlook Handbook 20002001 Author:U S Department of Labor The Occupational Outlook Handbook (OOH) has come a long way since its first edition in the 1940s--replete with positions fueled by a wartime economy. One thing has not changed, however: For more than 50 years, the OOH has been respected as the job seeker's number one source of critical decision-making information. From aerospace engineer to wate... more »r treatment plant operator, the latest edition spans more than 250 occupations, encompassing nearly 90 percent of the jobs in the U.S. economy.« less