Education in Engineering in Spain had traditionally not too many specialties (Naval, Aerospatial, Industrial, Civil, Telecommunications, Informatics, among others) as in the past specialization was not so necessary but after Bologna the Degrees and Masters branched out numerously, giving birth to hundreds of different combinations, opening the possibility to do a bachelor's degree in one university and specialty and then to take a master's degree on another specialty, perhaps at a different university, having usually passed an individual interview by the dean and/or a "Propedeutics" exam or test of some sort, designed to guarantee a solid basis upon which to build further knowledge, that must take into consideration the relationship between the two branches of knowledge and among the subjects being taught at both degrees at the origin and the destination.