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| Squeak Smalltalk | |
|---|---|
| Name | Squeak Smalltalk |
| Paradigm | Object-oriented, reflective, image-based |
| Designer | Adele Goldberg, Dan Ingalls, Alan Kay, Ted Kaehler, Dan Bricklin |
| Developer | Apple Inc., Viewpoints Research Institute, Disney Interactive, Yale University |
| First appeared | 1996 |
| Typing | Dynamic, strong |
| Influenced by | Smalltalk-80, Self (programming language), LISP, Logo (programming language) |
| Influenced | Pharo, Croquet, Etoys, Scratch (programming language), OpenSmalltalkVM |
Squeak Smalltalk is an open-source, portable implementation of Smalltalk notable for its image-based system, rich multimedia capabilities, and pedagogical tools. Originating from researchers and developers associated with Apple Inc. and Xerox PARC, it has been used in projects spanning academic research, commercial multimedia, and educational initiatives. The system emphasizes live coding, direct manipulation, and end-to-end object orientation, and it has spawned multiple forks and related projects across industry and academia.
Squeak Smalltalk traces roots to contributions by Alan Kay, Dan Ingalls, Adele Goldberg, Ted Kaehler, and collaborators who previously worked at Xerox PARC, Apple Inc., and PARC (company). Initial releases in the mid-1990s coincided with work at Apple Computer and collaborations with Disney Interactive and Viewpoints Research Institute, fostering connections to projects such as Etoys and the Toot educational environment. Subsequent developments involved releases under open-source licenses, interactions with MIT Media Lab, influence on OLPC (One Laptop per Child), and contributions from researchers affiliated with Yale University and Hewlett-Packard. The platform's evolution intersected with projects like Croquet and inspired downstream systems including Pharo and Scratch (programming language).
Squeak Smalltalk uses an image-based architecture similar to Smalltalk-80 and reflective mechanisms akin to Self (programming language). The virtual machine and object memory snapshot form a portable image influenced by concepts from LISP and Logo (programming language), enabling live object inspection and dynamic code modification. Its bytecode interpreter and JIT workstreams relate to efforts from OpenSmalltalkVM contributors and align with research from Sun Microsystems and IBM on dynamic language VMs. Graphics and sound subsystems reflect design choices comparable to multimedia work at Disney Interactive and graphical frameworks such as those from Xerox PARC labs.
Development in Squeak Smalltalk centers on an integrated environment derived from Smalltalk-80 browsers, inspectors, and debuggers used at Xerox PARC and refined by teams at Apple Inc. and Viewpoints Research Institute. Tools include a system browser, workspace, and object inspectors comparable to environments from GNUstep and influenced by UI research at MIT Media Lab. Instrumentation and profiling utilities draw upon techniques from Sun Microsystems and IBM performance tools, while packaging and deployment workflows intersect with tooling found in Pharo and Eclipse Foundation ecosystems. Education-oriented tools such as Etoys connect with curricula from OLPC (One Laptop per Child) and outreach programs at Yale University.
Squeak Smalltalk's notable features include an image-based persistence model, a Morphic graphics framework, and multimedia libraries that support bitmap and vector operations developed alongside work at Disney Interactive and Xerox PARC. Morphic's direct-manipulation approach shares lineage with research by Alan Kay and interactive design from MIT Media Lab. Libraries for networking, concurrency, and distributed simulation tie into projects like Croquet and research from Viewpoints Research Institute, while educational libraries such as Etoys influenced curricula at OLPC (One Laptop per Child). Sound and video handling reflect practices used in multimedia tools from Adobe Systems and Apple Computer.
Implementations and ports of the Squeak virtual machine have been produced by groups including OpenSmalltalkVM contributors and partnerships with organizations such as Yale University and Hewlett-Packard. Ports target platforms ranging from desktop systems supported by Microsoft-compatible environments to embedded devices influenced by initiatives at OLPC (One Laptop per Child). Work on JIT compilation, garbage collection, and cross-platform toolchains connects to research and engineering from Sun Microsystems, IBM, and community-driven projects like Pharo. Integrations with web and networking stacks align with contributions originating in MIT Media Lab and open-source foundations.
The Squeak Smalltalk community comprises researchers, educators, and developers from institutions such as Viewpoints Research Institute, MIT Media Lab, Yale University, and contributors formerly associated with Apple Inc. and Disney Interactive. Governance has oscillated between foundation-led stewardship and meritocratic community processes similar to those at Apache Software Foundation and Eclipse Foundation, with key discussions occurring on public mailing lists, repositories, and workshops hosted by organizations like ACM and conferences such as OOPSLA and ICSE. Outreach and education efforts connect to initiatives like OLPC (One Laptop per Child), and derivative projects such as Pharo and Croquet maintain active ecosystems that interoperate with Squeak Smalltalk artifacts.
Category:Smalltalk environments