Berkeley DB (BDB) is a software library that provides a high-performance embedded database for key/value data. As of 2012, Berkeley DB is the most widely used database toolkit in the world, with hundreds of millions of deployed copies. Berkeley DB is written in C with API bindings for C++, PHP, Java, Perl, Python, Ruby, Tcl, Smalltalk, and most other programming languages. BDB stores arbitrary key/data pairs as byte arrays, and supports multiple data items for a single key. Berkeley DB is not a relational database. BDB can support thousands of simultaneous threads of control or concurrent processes manipulating databases as large as 256 terabytes, on a wide variety of operating systems including most Unix-like and Windows systems, and real-time operating systems. Berkeley DB is also used as the common name for three distinct products; Oracle Berkeley DB, Berkeley DB Java Edition, and Berkeley DB XML. These three products all share a common ancestry and are currently under active development at Oracle Corporation.
Read more about Berkeley DB: Origin, Architecture, Editions, Programs That Use Berkeley DB, Licensing
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Edward: Darling, answer me one thing truthfully. Have you ever seen gingerbread with gilt on it?
Edith: [laughing] Fool!
Edward: Then the whole argument is disposed of.”
—Reginald Berkeley (1890 N1935)