These systems are often used by banks, stock exchanges, telecommunication providers and other enterprises requiring very reliable computer systems. Originally introduced in 1976 by Tandem Computers Inc., those systems have been further developed by Compaq (since 1997) and later on by HP (since 2003). In 2005, the current product line of HP Integrity NonStop servers (based on Intel Itanium microprocessors) was introduced.
NonStop systems are based on an integrated hardware/software stack, are designed for "no single point of failure" (redundant components, automatic reconfiguration in the event of a component failure) and run the NonStop OS operating system and the NonStop SQL database management system.
Meanwhile, HP has introduced a data warehouse / business intelligence server line called HP Neoview, which is based on NonStop technology. It acts as a database server (providing the NonStop operating system and the NonStop SQL database) but lacks the transaction processing functionality of the original NonStop systems. Further details on the Neoview product line can be found at