Thailand's Correctional Staff Training Centre, established in 1966, is responsible for both preservice and inservice training courses for correctional staff at all levels. Only eight courses are selected for operation each year, depending on training needs. Some problems that must be addressed are the shortage of fulltime lecturers, a limited budget, and the increase in the number of prison personnel recruited. Prisoners may be released under sentence remission (good time allowance), public work allowance, parole, and supervison by pardon. the public work allowance involves the release of inmates for public works projects outside the prison. To develop inmates' vocational skills, every inmate is required either to work or to participate in education or vocational courses provided in all correctional institutions. Currently, 13 industrial occupations are offered in training courses. Prison camps and open institutions have been used for agricultural training. Vocational training in all prisons has been limited by insufficient budgets and a shortage of vocational instructors. A uniform method of inmate classification has not yet been implemented throughout the country due to staff shortage and the structure of the prison system. Overcrowding is also a major hindrance to classification, since this prevents the establishment of separate reception facilities for the purpose of classification assessment. Classification has been limited to separation between male and female inmates, juvenile and adult inmates, and drug-addicted inmates and other inmates. Data are provided on the number of inmates involved in various forms of supervised release.