# SIGNAL

> programming language

**Wikidata**: [Q7390335](https://www.wikidata.org/wiki/Q7390335)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SIGNAL_(programming_language))  
**Source**: https://4ort.xyz/entity/signal

## Summary
SIGNAL is a declarative programming language created in 1980 for communicating instructions to a machine. It belongs to the class of programming languages and is specifically designed around declarative programming paradigms.

## Key Facts
- Inception year: 1980
- Programming paradigm: declarative programming
- Instance of: programming language
- Wikipedia sitelinks: 1
- Freebase ID: /m/0h1dzh7
- Available Wikipedia languages: English
- Wikidata description: programming language

## FAQs
### Q: What type of programming language is SIGNAL?
A: SIGNAL is a declarative programming language, meaning it expresses the logic of computation without describing its control flow.

### Q: When was SIGNAL created?
A: SIGNAL was created in 1980.

### Q: Is SIGNAL still actively used today?
A: The source material does not provide information about SIGNAL's current usage or adoption.

## Why It Matters
As a declarative programming language created in 1980, SIGNAL represents an early example of the declarative paradigm in programming language design. Declarative languages like SIGNAL allow programmers to specify what the program should accomplish rather than how to accomplish it, which can lead to more concise and maintainable code. While the source material provides limited details about SIGNAL's specific applications or influence, its classification as a declarative language places it within an important category of programming languages that includes well-known examples like SQL and Haskell. The existence of SIGNAL contributes to the diversity of programming paradigms available to developers, offering alternative approaches to problem-solving in software development.

## Notable For
- Created in 1980, making it one of the earlier declarative programming languages
- Purely declarative paradigm, distinguishing it from imperative languages
- Single Wikipedia sitelink suggests limited but documented presence

## Body
### Overview
SIGNAL is a programming language that emerged in 1980, classified within the declarative programming paradigm. Unlike imperative languages that focus on describing how a program operates, declarative languages like SIGNAL emphasize what the program should accomplish.

### Technical Classification
As a declarative programming language, SIGNAL joins a family of languages that includes SQL for database queries, regular expressions for pattern matching, and functional programming languages. The declarative approach allows programmers to write specifications that describe the desired results without explicitly listing the step-by-step commands to achieve those results.

### Documentation and References
SIGNAL has a minimal but documented presence, with a single Wikipedia article available in English. The language is cataloged in Wikidata with the identifier associated with the description "programming language" and maintains a Freebase ID for reference purposes.

## References

1. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)