A multidimensional database (MDB) is a type of database that is optimized for data warehouse and online analytical processing (OLAP) applications. Multidimensional databases are frequently created using input from existing relational databases.
An operational data store (ODS) is a type of database that's often used as an interim logical area for a data warehouse.
The Oracle TimesTen In-Memory Database is an in-memory relational database in which all data is located in random access memory (RAM).
In information technology, a repository (pronounced ree-PAHZ-ih-tor-i) is a central place in which an aggregation of data is kept and maintained in an organized way, usually in computer storage.