In article <1131095469.674716.296970_at_g44g2000cwa.googlegroups.com>,
sybrandb_at_yahoo.com says...
> Historically, there have been various types of DBMS
>
> The hierarchical database, maintaing physical pointers between various
> entities, n:m relations not implemented.
> The Network database, same type of database, n:m allowed. The most
> important implementation was IBM's IMS (acronym for IBMs Most
> Spectacular).
> The Relational database, implementing entities as tables.
>
> IBM, iirc, still supports IMS, as major insurance companies and banks
> all over the world are still using it. RDBMS has supplanted network
> databases.
>
>
IMS is a hierarchical database, IDMS is the most widely used network
database.
Received on Fri Nov 04 2005 - 03:55:03 CST
