In distributed computing, a remote procedure call (RPC) is when a computer program causes a procedure (subroutine) to execute in a different address space, which is written as if it were a normal (local) procedure call, without the programmer explicitly writing the details for the remote interaction. That is, the programmer writes essentially the same code whether the subroutine is local to the executing program, or remote. This is a form of client–server interaction, typically implemented via a request–response message-passing system. In the object-oriented programming paradigm, RPCs are represented by remote method invocation (RMI). The RPC model implies a level of location transparency, namely that calling procedures are largely the same whether they are local or remote, but usually, they are not identical, so local calls can be distinguished from remote calls. Remote calls are usually orders of magnitude slower and less reliable than local calls, so distinguishing them is important.
In software engineering and computer science, abstraction is the process of generalizing concrete details, such as attributes, away from the study of objects and systems to focus attention on details of greater importance. Abstraction is a fundamental concept in computer science and software engineering, especially within the object-oriented programming paradigm. Examples of this include:
Ole-Johan Dahl was a Norwegian computer scientist. Dahl was a professor of computer science at the University of Oslo and is considered to be one of the fathers of Simula and object-oriented programming along with Kristen Nygaard.
ASSIST is an IBM System/370-compatible assembler and interpreter developed in the early 1970s at Penn State University by Graham Campbell and John Mashey. plus student assistants.
In computer programming, a software framework is an abstraction in which software, providing generic functionality, can be selectively changed by additional user-written code, thus providing application-specific software. It provides a standard way to build and deploy applications and is a universal, reusable software environment that provides particular functionality as part of a larger software platform to facilitate the development of software applications, products and solutions.
BlueJ is an integrated development environment (IDE) for the Java programming language, developed mainly for educational purposes, but also suitable for small-scale software development. It runs with the help of Java Development Kit (JDK).
In computer science, message passing is a technique for invoking behavior on a computer. The invoking program sends a message to a process and relies on that process and its supporting infrastructure to then select and run some appropriate code. Message passing differs from conventional programming where a process, subroutine, or function is directly invoked by name. Message passing is key to some models of concurrency and object-oriented programming.
In object-oriented programming, inheritance is the mechanism of basing an object or class upon another object or class, retaining similar implementation. Also defined as deriving new classes from existing ones such as super class or base class and then forming them into a hierarchy of classes. In most class-based object-oriented languages like C++, an object created through inheritance, a "child object", acquires all the properties and behaviors of the "parent object", with the exception of: constructors, destructors, overloaded operators and friend functions of the base class. Inheritance allows programmers to create classes that are built upon existing classes, to specify a new implementation while maintaining the same behaviors, to reuse code and to independently extend original software via public classes and interfaces. The relationships of objects or classes through inheritance give rise to a directed acyclic graph.
Matthias Felleisen is a German-American computer science professor and author. He grew up in Germany and immigrated to the US in his twenties. He received his PhD from Indiana University under the direction of Daniel P. Friedman.
Michael Kölling is a German computer scientist, currently working at King's College London, best known for the development of the BlueJ and Greenfoot educational development environments and as author of introductory programming textbooks. In 2013 he received the SIGCSE Award for Outstanding Contribution to Computer Science Education for the development of the BlueJ.
Mark Joseph Guzdial is a Professor in the College of Engineering at the University of Michigan. He was formerly a professor in the School of Interactive Computing at the Georgia Institute of Technology affiliated with the College of Computing and the GVU Center. He has conducted research in the fields of computer science education and the learning sciences and internationally in the field of Information Technology. From 2001–2003, he was selected to be an ACM Distinguished Lecturer, and in 2007 he was appointed Vice-Chair of the ACM Education Board Council. He was the original developer of the CoWeb, one of the earliest wiki engines, which was implemented in Squeak and has been in use at institutions of higher education since 1998. He is the inventor of the Media Computation approach to learning introductory computing, which uses contextualized computing education to attract and retain students.
In object-oriented programming, behavioral subtyping is the principle that subclasses should satisfy the expectations of clients accessing subclass objects through references of superclass type, not just as regards syntactic safety but also as regards behavioral correctness. Specifically, properties that clients can prove using the specification of an object's presumed type should hold even though the object is actually a member of a subtype of that type.
Owen Astrachan is an American computer scientist and professor of the practice of computer science at Duke University, where he is also the department's director of undergraduate studies. He is known for his work in curriculum development and methods of teaching computer science. He was one of the first National Science Foundation CISE Distinguished Education Fellows, and is a recipient of the ACM Outstanding Educator Award. He was the principal investigator on the multi-year NSF/College Board project that led to the release of the AP Computer Science Principles course and exam.
Agent-oriented programming (AOP) is a programming paradigm where the construction of the software is centered on the concept of software agents. In contrast to object-oriented programming which has objects at its core, AOP has externally specified agents at its core. They can be thought of as abstractions of objects. Exchanged messages are interpreted by receiving "agents", in a way specific to its class of agents.
John Rosenberg is an Australian higher education consultant, professional Board Director, Australian academic, information technology (IT) professional and the former Senior Deputy Vice-Chancellor and Vice-President at La Trobe University in Victoria, Australia.
A frame-based editor is a specific kind of structure editor, typically used as a source code editor for the manipulation of computer programs. Program elements are represented by frames, which form the standard atomic unit of manipulation in the editor.
The Outstanding Contribution to Computer Science Education award is a prize granted by the Association for Computing Machinery (ACM) Special Interest Group (SIG) on Computer science education (SIGCSE). Outstanding contributions can include curriculum design, innovative teaching methods, authorship of textbooks, and the development of novel teaching tools. The award has been granted annually since 1981. The SIGCSE website contains more information about the awardees.
Susan Sentance is a British computer scientist, educator and director of the Raspberry Pi Foundation Computing Education Research Centre at the University of Cambridge. Her research investigates a wide range of issues computer science education, teacher education and the professional development of those teaching computing. In 2020 Sentance was awarded a Suffrage Science award for her work on computing education.
In type theory, session types are used to ensure correctness in concurrent programs. They guarantee that messages sent and received between concurrent programs are in the expected order and of the expected type. Session type systems have been adapted for both channel and actor systems.
Danish computer scientist Michael Edelgaard Caspersen has spent his academic life furthering computer science education, at all levels. His research interests are computing education, programming didactics, programming methodology, and object-oriented programming. He is best known for his work on computing education research and development, particularly his work to promote informatics as a fundamental discipline for all.
