Ada (programming language)
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| Ada (programming language) | |
|---|---|
.png) Captain-Haddock17 · Public domain · source | |
| Name | Ada |
| Paradigm | Multi-paradigm |
| Designed by | Jean Ichbiah and S. Tucker Taft |
| Developed by | CII Honeywell Bull |
| First appeared | 1983 |
| Typing | Statically typed |
| Platform | Cross-platform |
| File extension | .adb, .ads |
| Website | [https://www.adaic.org/ AdaIC] |
Ada (programming language) is a multi-paradigm programming language designed by Jean Ichbiah and S. Tucker Taft for the United States Department of Defense (DoD) to replace over 450 programming languages used by the DoD at the time, with the goal of increasing software reliability and maintainability, as envisioned by Robert W. Taylor and Larry Druffel. The language was named after Ada Lovelace, often considered the first computer programmer, due to her work on Charles Babbage's Analytical Engine. The development of the language involved CII Honeywell Bull, Alsys, and Intermetrics, with significant contributions from Grumman Aerospace and IBM. The language's design was influenced by Pascal, COBOL, and Simula, as well as the work of Edsger W. Dijkstra and Donald Knuth.
Introduction
The introduction of Ada marked a significant milestone in the development of programming languages, as it was designed to support object-oriented programming, concurrent programming, and exception handling, as well as type safety and data encapsulation, concepts that were also explored by Barbara Liskov and Alan Kay. The language's design was influenced by the work of Niklaus Wirth and Brian Kernighan, and it has been used in a wide range of applications, including avionics systems, railway systems, and medical devices, with companies such as Lockheed Martin, Northrop Grumman, and Siemens utilizing the language. The language has also been used in academic research, with contributions from Carnegie Mellon University, Massachusetts Institute of Technology (MIT), and Stanford University. The Ada language has been standardized by the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO), with input from Microsoft, Oracle Corporation, and IBM.
History
The history of Ada began in the 1970s, when the United States Department of Defense (DoD) launched the Ada project to develop a new programming language that could replace the numerous languages used by the DoD at the time, with the goal of reducing costs and improving software reliability, as advocated by Harlan Mills and Frederick Brooks. The project involved a competition between several language design teams, including CII Honeywell Bull, Alsys, and Intermetrics, with Jean Ichbiah and S. Tucker Taft leading the winning team, and with contributions from Grumman Aerospace and IBM. The language was named after Ada Lovelace, and it was first released in 1983, with the first implementation being developed by Alsys, and with subsequent implementations developed by Intermetrics and IBM. The language has undergone several revisions, including Ada 83, Ada 95, and Ada 2005, with input from Microsoft, Oracle Corporation, and Siemens.
Language_features
The Ada language features a strong focus on type safety and data encapsulation, as well as support for object-oriented programming, concurrent programming, and exception handling, concepts that were also explored by Barbara Liskov and Alan Kay. The language also features a unique syntax, with a focus on readability and maintainability, as envisioned by Donald Knuth and Edsger W. Dijkstra. The language's type system is based on the concept of strong typing, with a focus on preventing type errors at runtime, as advocated by Niklaus Wirth and Brian Kernighan. The language also features a range of libraries and frameworks, including the Ada Standard Library and the GNAT compiler, developed by New York University (NYU) and AdaCore, with contributions from Carnegie Mellon University and Massachusetts Institute of Technology (MIT).
Implementations
There are several implementations of the Ada language, including the GNAT compiler, developed by New York University (NYU) and AdaCore, with contributions from Carnegie Mellon University and Massachusetts Institute of Technology (MIT). Other implementations include the Janus/Ada compiler, developed by RR Software, and the APSE (Ada Programming Support Environment) implementation, developed by Intermetrics, with input from Microsoft, Oracle Corporation, and IBM. The language has also been implemented on a range of platforms, including Windows, Linux, and Unix, with companies such as Lockheed Martin, Northrop Grumman, and Siemens utilizing the language.
Applications
The Ada language has been used in a wide range of applications, including avionics systems, railway systems, and medical devices, with companies such as Lockheed Martin, Northrop Grumman, and Siemens utilizing the language. The language has also been used in academic research, with contributions from Carnegie Mellon University, Massachusetts Institute of Technology (MIT), and Stanford University. The language's strong focus on type safety and data encapsulation makes it well-suited to applications where software reliability and maintainability are critical, as advocated by Harlan Mills and Frederick Brooks. The language has also been used in space exploration, with the European Space Agency (ESA) and NASA utilizing the language in several missions, including the International Space Station and the Mars Curiosity Rover.
Comparison_to_other_languages
The Ada language is often compared to other programming languages, such as C++ and Java, with regards to its performance, type safety, and data encapsulation, concepts that were also explored by Barbara Liskov and Alan Kay. The language's strong focus on type safety and data encapsulation makes it well-suited to applications where software reliability and maintainability are critical, as advocated by Harlan Mills and Frederick Brooks. The language's unique syntax and libraries also make it a popular choice for embedded systems and real-time systems, with companies such as Lockheed Martin, Northrop Grumman, and Siemens utilizing the language. The language has also been compared to Rust and Go, with regards to its performance and concurrency features, as explored by Graydon Hoare and Rob Pike.