# Jon Herlocker

> American computer scientist

**Wikidata**: [Q102299407](https://www.wikidata.org/wiki/Q102299407)  
**Source**: https://4ort.xyz/entity/jon-herlocker

## Summary
Jon Herlocker is an American computer scientist known for his pioneering work on collaborative filtering recommender systems. His most significant contribution is the development of GroupLens, which automated personalized recommendations by leveraging user ratings, impacting both industry and academic research.

## Biography
- Born: [Date and place not provided]
- Nationality: United States
- Education:
  - Doctor of Philosophy, Computer Science, University of Minnesota (2000)
  - Bachelor of Science, Mathematics and Computer Science, Lewis & Clark College (1994)
- Known for: Development of the GroupLens collaborative filtering recommender system
- Employer(s): [Not provided]
- Field(s): [Specific field not provided beyond "computer scientist"]

## Contributions
Jon Herlocker's primary contribution is the GroupLens Collaborative Filtering Recommender Systems. Developed with his collaborators, this system demonstrated how a distributed set of users could receive personalized recommendations by sharing ratings. This breakthrough, patented and published in the mid-1990s, showed how to automate the process of harnessing collective user data. The impact was profound: GroupLens became a foundational technology, directly leading to commercial applications in numerous recommendation platforms (like early versions of Amazon and Netflix) and spawning extensive academic research into recommender systems. It established the core principles of collaborative filtering that remain central to modern personalization engines across the internet.

## FAQs
### Q: What is Jon Herlocker most famous for?
A: Jon Herlocker is most famous for developing the GroupLens Collaborative Filtering Recommender System, which demonstrated how automated personalized recommendations could be generated by sharing user ratings.

### Q: What major award did Jon Herlocker receive?
A: He received the ACM Software System Award in 2010 specifically for his work on the GroupLens Collaborative Filtering Recommender Systems.

### Q: Where did Jon Herlocker earn his degrees?
A: He earned a Bachelor of Science in Mathematics and Computer Science from Lewis & Clark College in 1994 and a Doctor of Philosophy in Computer Science from the University of Minnesota in 2000.

### Q: What is the core technology behind GroupLens?
A: GroupLens is based on collaborative filtering, a technique that automates personalized recommendations by analyzing patterns in ratings from a distributed group of users to predict preferences for individuals.

## Why They Matter
Jon Herlocker fundamentally reshaped how digital experiences are personalized. His work on GroupLens provided the practical blueprint for large-scale, automated recommendation systems. By proving how distributed user ratings could effectively power personalized suggestions, his research directly enabled the modern recommendation economy found in e-commerce, streaming services, and content platforms. Without his foundational contribution, the efficiency and widespread adoption of personalization algorithms that underpin trillions of dollars in commerce and user engagement today would not have been possible. His work continues to be cited extensively and serves as the bedrock for generations of researchers building and refining recommender technologies.

## Notable For
- Pioneering development of the GroupLens Collaborative Filtering Recommender Systems, demonstrating automated personalized recommendations via shared user ratings.
- Recipient of the prestigious ACM Software System Award in 2010 for the GroupLens project.
- Groundbreaking research that directly enabled commercial recommendation systems and fueled extensive subsequent academic research.
- Key figure in establishing the core principles and practical implementation of collaborative filtering algorithms.

## Body
### Education & Background
- Male American computer scientist.
- Aliases: Jonathan L. Herlocker, Jonathan Herlocker.
- Doctor of Philosophy (Ph.D.) in Computer Science, University of Minnesota (completed 2000).
- Bachelor of Science (B.S.) in Mathematics and Computer Science, Lewis & Clark College (completed 1994).

### Key Research & Technology: GroupLens
- Developed the GroupLens Collaborative Filtering Recommender Systems.
- Demonstrated how to automate the process of providing personalized recommendations by leveraging ratings shared by a distributed set of users.
- Highlighted impact: Led to both the creation of commercial products (e.g., early recommendation platforms) and extensive academic research into recommender systems.
- Received the ACM Software System Award in 2010 specifically for this work, with the citation noting its role in enabling personalized recommendations through automated rating sharing.

### Professional Identifiers
- DBLP Author ID: 04/3985
- Google Scholar Author ID: fHbNyTwAAAAJ
- LinkedIn Personal Profile ID: herlocker
- SPIE Profile ID: 4398594
- Mathematics Genealogy Project ID: 99764

## References

1. Mathematics Genealogy Project
2. [Source](https://fernweh-insights.castos.com/episodes/episode-34-jon-herlocker)
3. [Source](https://awards.acm.org/software-system/award-recipients)