


The need for an international standard classification of occupations was, in fact, discussed at the first ICLS in 1923, although this conference did not propose a specific grouping of occupations. The history of the development of ISCO has always been closely connected with the work of the International Conference of Labour Statisticians (ICLS) which meets under the auspices of the International Labour Organization (ILO). The third version, ISCO-88, was adopted by the Fourteenth ICLS in 1987.ĭistinctions between different occupational classes were introduced in population censuses undertaken in the early parts of the 19th century in several countries, but the identification of occupation and industry as different variables, each requiring its own classification, was only made towards the end of that century, as it became increasingly clear that the division of labour between firms and organizations in an industrial society was distinct from the division of labour between different jobs within the same firm. ISCO-58 was superseded by ISCO-68, which was adopted by the Eleventh ICLS in 1966. The first complete version of ISCO was adopted in 1957 by the Ninth International Conference of Labour Statisticians (ICLS), it is known as ISCO-58. In addition to ISCO-08, three versions of ISCO were developed in the past. the amount of informal on-the-job training and/or previous experience in a related occupation required for competent performance of these tasks and duties.

the level of formal education defined in terms of the International Standard Classification of Education (ISCED-97) (UNESCO, 1997) required for competent performance of the tasks and duties involved and.

