носитель однократной записи(Write once read many (WORM) describes a data storage device in which information, once written, cannot be modified; this write protection affords the assurance that the data cannot be tampered with once it is written to the device.)
нормальная форма(projection-join normal form a level of database normalization designed to reduce redundancy in relational databases recording multi-valued facts by isolating semantically related multiple relationships databasedesign-resource.com)