From Oracle FAQ
Smalltalk is an object-oriented computer language designed specifically for a wide range of humans rather than a narrow group of computer specialists.
Smalltalk has comprehensive and mature class library (code) available for building enterprise systems. This object-oriented language is popular in businesses with complex application needs like telecommunications, banking and finance.
Smalltalk was created in the mid-70s at the famed Xerox Palo Alto Research Center (PARC). It was the first complete graphical object-oriented development environment produced.
Simple one liner to say Hello:
Transcript show: 'Hello, world!'.
Smalltalk applications can access databases, including Oracle, using a JDBC API.