Data from the 1991 National Household Education Survey, which was a random telephone survey of the noninstitutionalized civilian population of the 50 states and District of Columbia, were analyzed to identify patterns of adult enrollment in employment-related training. The analysis established that one of every three employed individuals aged 17 years or older was enrolled in at least one job-related training course during the 12 months prior to spring 1991. The most frequently attended types of training courses were as follows: professional development (25%), technical or skilled job training (20%), executive or management development (13%), supervisory skills (12%), job health and safety (12%), word processing/computer software and quality or statistical process control (10%), sales and marketing (8%), and new employee (7%). Managers and professionals accounted for 56% of adults enrolled in job-related training programs. Holders of a baccalaureate or higher degree constituted 53% of those undertaking work-related training. Men and women were equally likely to enroll in some type of work-related training and were most likely to do so between the ages of 35 and 44 years. White enrollment in professional development courses tended to be higher than Hispanic enrollment. (Contains 12 tables/figures.) (MN)