A study examined the participation of handicapped individuals in apprenticeship programs. Data for this state-of-the-art review were gathered from an extensive review of the existing literature, interviews, mail and telephone surveys, site visitations, and structured meetings. It was found that the number of handicapped persons participating in apprenticeship represents less than 2 percent (and very probably less than 1 percent) of the total apprentice population. Education and rehabilitation professionals tend to relate the factors facilitating or acting as barriers to disabled persons' participation in apprenticeship to systemic features of the apprenticeship system. On the other hand, representatives of apprenticeship tend to see these same factors more in terms of the characteristics of individuals and requirements of the trades. The information (both statistical and descriptive) available on handicapped persons' participation in apprenticeship is limited, anecdotal, and related primarily to special projects. Four successful apprentice programs including disabled persons were documented. A strong effort in public relations is needed to inform employers, union leaders, parents, and the general public of opportunities for handicapped persons in apprenticeship. Fifty references are cited. (Appendixes include lists of key federal and state agencies and national and international organizations concerned with apprenticeship and education and training for handicapped persons.) (MN)