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Smalltalk is an object-oriented, dynamically typed reflective programming language. It was designed and created in the 1970s at Xerox PARC and gained prominence in the 1980s as one of the first truly object-oriented programming languages. Smalltalk introduced many concepts still used today, including its elegant and simple syntax with a message-passing paradigm at its core. The open implementation also allows for easy extension and modification of existing codebases without having to resort to hacks or workarounds.