Smalltalk
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| Smalltalk | |
|---|---|
| Name | Smalltalk |
| Paradigm | Object-oriented |
| Designed by | Alan Kay, Adele Goldberg, Dan Ingalls |
| Developed by | Xerox PARC |
| First appeared | 1972 |
| Typing | Dynamically typed |
| Platform | Cross-platform |
Smalltalk is a high-level, dynamically typed programming language that was designed to support object-oriented programming and is known for its simplicity, flexibility, and ease of use, as seen in the work of Alan Kay, Adele Goldberg, and Dan Ingalls at Xerox PARC. It was influenced by Simula, Lisp, and Logo, and has been used in a variety of applications, including computer-aided design and computer-aided manufacturing at companies like IBM and Microsoft. Smalltalk has a strong focus on software reuse and modularity, making it a popular choice for agile software development and extreme programming, as advocated by Kent Beck and Ward Cunningham. The language has also been used in research and development at institutions like Carnegie Mellon University and Massachusetts Institute of Technology.
Introduction to Smalltalk
Smalltalk is based on a few simple concepts, including objects, classes, and messages, which were influenced by the work of Alan Turing and John von Neumann. It has a unique syntax and semantics, which are designed to support object-oriented programming and interactive programming, as seen in the Xerox Alto computer. The language is often used in educational institutions, such as University of California, Berkeley and Stanford University, to teach computer science and software engineering concepts, including data structures and algorithms, as developed by Donald Knuth and Robert Tarjan. Smalltalk has also been used in research projects, such as the Self project at Sun Microsystems, which was led by David Ungar and Randall Smith.
History of Smalltalk
The development of Smalltalk began in the early 1970s at Xerox PARC, where a team led by Alan Kay and Adele Goldberg designed and implemented the language, with input from Dan Ingalls and Ted Kaehler. The first version of Smalltalk, called Smalltalk-72, was released in 1972, and was influenced by the work of Simula and Lisp developers, including Ole-Johan Dahl and Kristen Nygaard. Over the years, Smalltalk has undergone several revisions, including Smalltalk-80, which was released in 1980 and became the standard for the language, with contributions from Apple Inc. and IBM. Smalltalk has been used in a variety of applications, including computer-aided design and computer-aided manufacturing at companies like General Motors and Boeing, and has been influenced by the work of Douglas Engelbart and Ivan Sutherland.
Language Features
Smalltalk has a number of unique language features, including blocks, closures, and metaclasses, which were influenced by the work of Lisp and Scheme developers, including Guy Steele and Gerald Jay Sussman. It also has a strong focus on software reuse and modularity, making it a popular choice for agile software development and extreme programming, as advocated by Kent Beck and Ward Cunningham. The language has a simple syntax and semantics, which are designed to support object-oriented programming and interactive programming, as seen in the Xerox Alto computer. Smalltalk also has a number of built-in features, including garbage collection and reflection, which were developed by John McCarthy and Edsger W. Dijkstra.
Implementation and Platforms
Smalltalk has been implemented on a variety of platforms, including Unix, Windows, and Mac OS X, with contributions from Apple Inc. and IBM. The language has also been used on a number of embedded systems, including robots and automated vehicles, as developed by NASA and General Motors. There are several different implementations of Smalltalk, including Pharo, Squeak, and Gemstone, which were developed by INRIA and University of Illinois at Urbana-Champaign. Smalltalk has also been used in cloud computing and distributed systems, as seen in the work of Amazon Web Services and Google Cloud Platform, with input from Jeff Bezos and Sundar Pichai.
Applications and Usage
Smalltalk has been used in a variety of applications, including computer-aided design and computer-aided manufacturing at companies like General Motors and Boeing, with contributions from Douglas Engelbart and Ivan Sutherland. It has also been used in research projects, such as the Self project at Sun Microsystems, which was led by David Ungar and Randall Smith. Smalltalk has been used in educational institutions, such as University of California, Berkeley and Stanford University, to teach computer science and software engineering concepts, including data structures and algorithms, as developed by Donald Knuth and Robert Tarjan. The language has also been used in game development, as seen in the work of Electronic Arts and Activision, with input from Will Wright and John Carmack.
Influence and Legacy
Smalltalk has had a significant influence on the development of object-oriented programming and software engineering, as seen in the work of Bjarne Stroustrup and James Gosling. It has also influenced the development of other programming languages, including Java and Python, with contributions from Sun Microsystems and Google. Smalltalk has been used in a variety of applications, including computer-aided design and computer-aided manufacturing at companies like General Motors and Boeing, and has been influenced by the work of Douglas Engelbart and Ivan Sutherland. The language has also been used in research projects, such as the Self project at Sun Microsystems, which was led by David Ungar and Randall Smith. Smalltalk continues to be used today in a variety of applications, including game development and cloud computing, as seen in the work of Electronic Arts and Amazon Web Services, with input from Will Wright and Jeff Bezos.