Among Administrator (AD) exams, we can distinguish between generalists, specialists and linguists, though in administrative terms there is no such distinction at the time of recruitment or employment.
Exams which are not scheduled on a regular annual basis and the ones requiring specific, usually scientific, legal or economist profiles with experience in a specific field would be considered as a Specialist exam.
These competitions have the same tests as the others but there is a more stringent Talent Screener in which the profiles, work experience and other factors are carefully checked to make sure that only candidates with a fully relevant profile are allowed to take part in the Assessment Centre.
See also:
Function Groups, Recruitment, EU Officials, EU Jobs, Contract Agent, Temporary Agent
Related link:
EU Agency Selection and Recruitment Database