Bujejo
Bujejo ()  refers to the terminology of governmental officer who generally tends to have concurrent seat of central office and control agency especially dedicated to technology and miscellaneous duties. History
The idea of jejo was firstly used in Song and Yuan dynasty, which arrived in the late Goryeo period. Although Song and Won took the seat as normal affair of government, Goryeo adopted the status largely for unsteady or irregular seats. Therefore, bujejo could mean someone in emeritus or temporary worker. Later in Joseon, the number of jejo officer highly increased as concurrent seats, making out of dojejo and bujejo. Before Gyeongguk daejun was written, there had been dojejo, jejo and bujejo; each possessed specific hierarchy of government. According to Gyeongguk daejeon, the number of officers can be found; five for Saongwon, one each for Naeuiwon, Sanguiwon and Jeonokseo, while Seungmunwon did not designate exact number. See also
 Joseon dynasty
 Joseon dynasty politics

References
 Bujejo

Joseon