Exadata
Exadata (also called Oracle Exadata Database Machine) in-memory database appliance that supports OLTP (transactional) and OLAP (analytical) database systems.
Exadata, which was was first released in the fall of 2008, was collaborative effort between Oracle and Hewlett-Packard; Oracle designed the operating system, database and storage software and HP designed the hardware. Oracle Exadata now uses Sun-based hardware.