OJEU stands for the "Official Journal of the European Union".
The Official Journal of the European Union (OJ) is the only periodical published every working day in all official languages of the European Union (EU). It consists of two related series (L for legislation and C for information and notices) and a supplement (S for public procurement). There is also an electronic section to the C series, only published electronically.
Over 520,000 procurement notices are published with the OJEU each year. Approximately half of all publications are calls for tender. These have a combined value of roughly €420 billion.