This guide to the use of International Standard Classification of Education (ISCED) provides a summary of what ISCED is, what it has been designed to do, some of the things it has not been designed to do, and how it may be used. The system classifies courses, programs, and fields of education according to their educational content. The educational content of each course, program, and field is designated according to its level and its subject matter. ISCED level categories, with their code numbers, are the following: (0) education preceding the first level, (1) education at the first level, (2) education at the second level: first stage, (3) education at the second level: second stage, (5) education at the third level: first stage, of the type that leads to an award not the equivalent to a first university degree, (6) education at the third level: first stage, of the type that leads to a first university degree or the equivalent, (7) education at the third level: second stage, of the type that leads to a postgraduate university degree or the equivalent, and (9) education not definable by level. For related document see TM003536 and TM003537. (RC)