Charles Bachman designed the first computerised database in the early 1960s. In the 1970s E. F. Codd coined the term “relational database” (one that shows the relationship between different data records). The growth and development of the databases in the 1980s was mostly about the relational databases and the Structured Query Language (SQL), which remains in use to this day. Finance was a major user of SQL and relational databases from day one. However, financial data is inherently big and is getting bigger and more complex. The early 21st century saw an explosive growth in NoSQL databases, which were based on different data structures (e.g. key-value pair, wide column, graph, or document) from those used in the traditional databases. These new databases include key-value stores, document stores, in-memory databases, graph stores, time series stores, ledger databases, search databases, and more. Some have found extensive applications in finance.