Enscribe is the native hierarchical database in the commercial HP NonStop (Tandem) servers.
The product primarily is used for online transaction processing and is tailored for organizations that need high availability and scalability for their database system.
Typical users of the product are stock exchanges, telecommunications, POS, and bank ATM networks.
[3] Many of the applications developed in HP NonStop servers (often critical ones) run on Enscribe databases.
First released in the early 1980s, and initially carrying an added charge until it was included with the operating system, the product became one of the few hierarchical data base systems that scales almost linearly with the number of processors in the machine: adding a second CPU to an existing server almost exactly doubled its performance.