Introduction
Importance: Database systems have become an essential component of life in modern society, in that many frequently occurring events trigger the accessing of at least one database: bibliographic library searches, bank transactions, hotel/airline reservations, grocery store purchases, etc., etc.
Traditional vs. more recent applications of databases:
The applications mentioned above are all "traditional" ones for which the use of rigidly-structured textual and numeric data suffices. Recent advances have led to the application of database technology to a wider class of data. Examples include multimediadatabases (involving pictures, video clips, and sound messages) and geographicdatabases (involving maps, satellite images).
Also, database search techniques are applied by some WWW search engines.
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