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en-til-en relation
IT	1:1 relationship; one-to-one relationship
en til en-relation
comp., MS	one-to-one relationship (An association between two tables in which the primary key value of each record in the primary table corresponds to the value in the matching field or fields of one, and only one, record in the related table)
én til én relation
IT, dat.proc.	one-to-one relation

en-til-en relation: 7 phrases in 2 subjects

Information technology	6
Microsoft	1