# Andreas Zeller

> German computer scientist

**Wikidata**: [Q501321](https://www.wikidata.org/wiki/Q501321)  
**Source**: https://4ort.xyz/entity/andreas-zeller

## Summary
Andreas Zeller is a German computer scientist recognized for his work in software testing. He is best known for his significant contributions to the fields of automated debugging and mining software archives. Zeller is affiliated with Saarland University and the CISPA – Helmholtz Center for Information Security.

## Biography
- **Born**: 1965-10-28, Hanau
- **Nationality**: Germany
- **Education**: Technical University of Darmstadt (degree completed 1991), TU Braunschweig (Doktoringenieur, 1997)
- **Known for**: Contributions to automated debugging and mining software archives
- **Employer(s)**: Saarland University, CISPA – Helmholtz Center for Information Security, Microsoft Research
- **Field(s)**: Software testing

## Contributions
Andreas Zeller's work focuses on improving software reliability and development processes. His primary contributions are in the areas of automated debugging and mining software archives. These fields involve creating tools and techniques that automatically identify the causes of software failures and analyze the vast history of software projects (like version control repositories) to uncover patterns and insights.

As a member of the GNU Project, Zeller has served as the maintainer for the GNU Data Display Debugger (DDD), a popular graphical front-end for command-line debuggers. His research has provided foundational methods for systematically narrowing down the causes of bugs, a process often called "delta debugging." His work on mining software repositories helps developers understand how software evolves, predict future defects, and improve overall code quality. His contributions in these areas were formally recognized in 2010 when he was named an ACM Fellow.

## FAQs
### Q: What is Andreas Zeller known for?
A: Andreas Zeller is primarily known for his research and contributions to software testing, specifically in the areas of automated debugging and mining software archives.

### Q: What major award has Andreas Zeller received?
A: In 2010, Andreas Zeller was named an ACM Fellow for his "contributions to automated debugging, and to mining software archives."

### Q: Where does Andreas Zeller work?
A: Andreas Zeller is employed by Saarland University and the CISPA – Helmholtz Center for Information Security in Saarbrücken, Germany. He has also previously worked at Microsoft Research.

## Why They Matter
Andreas Zeller's work has had a significant impact on how software is developed and maintained. His research into automated debugging provides systematic, repeatable methods for isolating the root causes of software failures, drastically reducing the time and effort developers spend on fixing bugs. Techniques derived from his work are fundamental to modern debugging tools and practices, making software more reliable.

Furthermore, his pioneering efforts in mining software archives helped establish a new field of research that uses historical development data to improve future software. By analyzing code repositories, researchers and companies can now identify risk-prone code, understand developer productivity, and make data-driven decisions about software architecture. Without his contributions, the process of debugging would be far more manual and less efficient, and the practice of learning from software history would be significantly less developed.

## Notable For
- **ACM Fellow**: Named an ACM Fellow in 2010 for his contributions to automated debugging and mining software archives.
- **GNU Project Contributor**: Served as the maintainer for the GNU Data Display Debugger (DDD).
- **Academic Leadership**: Holds positions at Saarland University and the CISPA – Helmholtz Center for Information Security.
- **Pioneering Research**: A key figure in establishing and advancing the fields of automated debugging and mining software repositories.

## Body
### Early Life and Education
- **Birth**: Andreas Zeller was born on October 28, 1965, in Hanau, Germany.
- **Citizenship**: He is a citizen of Germany.
- **University Education**: He attended the Technical University of Darmstadt, completing his studies in 1991.
- **Doctorate**: He earned a Doktoringenieur degree from TU Braunschweig in 1997. His doctoral advisor was Gregor Snelting.

### Career and Affiliations
- **Current Employers**: Zeller is employed at Saarland University and the CISPA – Helmholtz Center for Information Security. His primary work location is Saarbrücken.
- **Past Employers**: He has previously worked for Microsoft Research.
- **Professional Memberships**:
    - **GNU Project**: Zeller is a member of the GNU Project, where he has maintained the Data Display Debugger (DDD).
    - **Association for Computing Machinery (ACM)**: He became an ACM Fellow on December 7, 2010.

### Research and Work
- **Field of Work**: Zeller's primary field is software testing.
- **Key Contributions**: His work is centered on automated debugging and mining software archives.
- **Awards**: He was named an ACM Fellow in 2010. The official citation recognizes him "For contributions to automated debugging, and to mining software archives."

## References

1. Catalog of the German National Library
2. Integrated Authority File
3. [Source](https://andreas-zeller.info/assets/ZellerCV.pdf)
4. [Source](https://www.acm.org/media-center/2010/december/acm-names-41-fellows-from-worlds-leading-institutions)
5. Mathematics Genealogy Project
6. International Standard Name Identifier
7. Virtual International Authority File
8. [Source](https://savannah.gnu.org/users/zeller)
9. [Source](https://svn.savannah.gnu.org/viewvc/ddd/trunk/AUTHORS?revision=7272)
10. National Library of Israel Names and Subjects Authority File