North American Computational Linguistics Open (NACLO)
Catalog organization: NACLO Organizing Committee
Compiled by: ExtracurricularHub Editorial Team — editorial policy
Last updated
What Is North American Computational Linguistics Open?
NACLO challenges eligible pre-university students to solve self-contained linguistics puzzles without prior language or computing knowledge. The 2027 Open Round is January 28 and lasts three hours; invited students take a four-hour round March 18. Registration opens October 12, 2026.
Participants must never have been full-time college students, be under 20 on the relevant IOL opening day, and be U.S. or Canadian citizens or attend a secondary school in either country. Register an account and an approved site. Sites normally charge no contest fee, though local travel and other expenses remain separate.
North American Computational Linguistics Open Key Facts: Cost, Deadline, and Eligibility
| Cost | Varies — see Cost and funding |
|---|---|
| Format | In person |
| Listing last updated | August 30, 2026 |
Program details shown here reflect the current catalog record.
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How to Apply to North American Computational Linguistics Open
Open the application for North American Computational Linguistics Open (NACLO)