Model 204 is a DBMS for IBM and compatible mainframes, which was first deployed in 1972. It is more than just a database system, incorporating a programming language and an environment for application development. Its key strength is its ability to deal with very large databases and very high transaction loads. Model 204 relies on its own type of bitmap index, originally devised by Professor Patrick E.

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  • Model 204 is a DBMS for IBM and compatible mainframes, which was first deployed in 1972. It is more than just a database system, incorporating a programming language and an environment for application development. Its key strength is its ability to deal with very large databases and very high transaction loads. Model 204 relies on its own type of bitmap index, originally devised by Professor Patrick E. O'Neil, and also combines the use of hash table, B-tree, and record list technologies to optimize speed and efficiency of database access. Model 204 is most commonly used in government and military applications. Among other things, it runs Australia's social security system. It is used commercially in the UK by Marks & Spencer. It is also used at the Ventura County Property Tax system in Ventura, California. It is a product of Computer Corporation of America (CCA). Add-on products are available from Sirius Software. Database Programmer's Toolkit is a freeware PC-based emulation.
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  • Model 204 is a DBMS for IBM and compatible mainframes, which was first deployed in 1972. It is more than just a database system, incorporating a programming language and an environment for application development. Its key strength is its ability to deal with very large databases and very high transaction loads. Model 204 relies on its own type of bitmap index, originally devised by Professor Patrick E.
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  • Model 204
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