Simon Willison’s Weblog

How Dopplr learns. Dopplr uses global and personal trip histories to disambiguate place names, and your friends’ schedules to help disambiguate dates in airline confirmation emails.

Posted 23rd July 2008 at 4:17 pm

Recent articles

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025
Useful patterns for building HTML tools - 10th December 2025

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