# John Cowan

> American computer scientist

**Wikidata**: [Q16730319](https://www.wikidata.org/wiki/Q16730319)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/John_W._Cowan)  
**Source**: https://4ort.xyz/entity/john-cowan-q16730319

## Summary
John Cowan is an American computer scientist best known for his significant contributions to the Lojban language. He is the author of *The Complete Lojban Language*, a definitive work that describes the grammar and usage of the constructed language. Active in his field from 1990 through 2020, Cowan is recognized for bridging the gap between computer science and linguistics.

## Biography
*   **Born:** 1950
*   **Nationality:** United States
*   **Known for:** Authoring *The Complete Lojban Language*; contributions to computer science and constructed languages.
*   **Field(s):** Computer Science, Linguistics (Lojban)
*   **Languages:** English, Lojban

## Contributions
John Cowan's primary contribution to the field of computer science and linguistics is the formalization and documentation of Lojban, a constructed language based on predicate logic. His most notable work, *The Complete Lojban Language*, serves as the comprehensive reference for the language's syntax and semantics. This work is crucial for the Lojban community, providing the standardized rules necessary for learning and using the language.

Beyond his authorship, Cowan has maintained an active online presence, contributing to discussions on his official blog, "Recycled Knowledge," and his personal website hosted by the Lojban organization. His involvement in the industry spans service and industrial sectors, with a digital footprint extending across multiple international Wikipedia languages (English and Russian) and library authority records.

## FAQs
### Q: What is John Cowan's most famous work?
A: John Cowan is best known for writing *The Complete Lojban Language*, which serves as the standard reference for the Lojban constructed language.

### Q: What languages does John Cowan speak?
A: According to available records, John Cowan speaks, writes, and signs English and Lojban.

### Q: What is John Cowan's professional background?
A: He is an American computer scientist active from roughly 1990 to 2020, with affiliations in the industrial and service sectors.

## Why They Matter
John Cowan matters significantly to the community of constructed languages and computational linguistics. By codifying *The Complete Lojban Language*, he provided a stable foundation for a language designed to be syntactically unambiguous—a key interest for computer scientists and logicians. His work ensures that Lojban remains accessible and standardized for future learners and developers. Without his comprehensive documentation, the practical application and study of Lojban would lack a central, authoritative guide, potentially fragmenting the language's evolution and limiting its utility in testing computer-human interaction hypotheses.

## Notable For
*   **Authorship:** Wrote *The Complete Lojban Language*, the definitive guide to the Lojban language.
*   **Linguistic Contribution:** Played a central role in the development and standardization of Lojban.
*   **Digital Presence:** Maintains a verified presence through the Library of Congress (ID: no2001011991) and VIAF.
*   **Cross-disciplinary Work:** Combines expertise in computer science with the intricacies of human language.

## Body
### Identity and Background
John Woldemar Cowan (also known as John W. Cowan) is an American male computer scientist born in 1950. He is a citizen of the United States. His professional life spans the industrial and service sectors, with active years (floruit) noted between 1990 and 2020.

### The Complete Lojban Language
Cowan's most significant output is the book *The Complete Lojban Language*. This work is widely cited and is the primary reason for his presence in library authority records such as the Library of Congress and the Online Books Page. The book details the grammar and morphology of Lojban, a language designed for logical precision.

### Online Presence and Identifiers
Cowan maintains a robust digital footprint. His personal website is hosted at `http://vrici.lojban.org/~cowan/`, and he runs an official blog titled "Recycled Knowledge" (`https://recycledknowledge.blogspot.com/`). He is active on Twitter under the handle `@Woldemar_Avalon`, an account created in July 2015.

His professional and authorial identity is tracked across several major databases:
*   **Wikidata:** Associated with the English and Russian Wikipedia entries for "John W. Cowan."
*   **Goodreads:** Author ID 5397082.
*   **VIAF ID:** 34100927.
*   **Freebase ID:** /m/0ynts_j.

## References

1. [web page](https://recycledknowledge.blogspot.com/2011/11/john-mccarthy-inventor-of-lisp-died.html)
2. Goodreads