Certificate of Sixth Year Studies
（重定向自CSYS）
In the past, the Certificate of Sixth Year Studies (CSYS) was the highest level of qualification available to pupils in the Scottish secondary education system. The CSYS was introduced in the 1960s.
Overseen by the Scottish Examination Board (SEB), it was taken by students in their sixth year (final year) of secondary education (ages 16–18) and was available for a range of different subjects. Examinations were administered by the SEB (and latterly by its successor, the Scottish Qualifications Authority, which absorbed and replaced it eventually). Unlike the Standard and Higher Grade examinations, it was not a part of the Scottish Certificate of Education.