My name is Sauparna Palchowdhury, I am a computer programmer and I live in Vancouver, Canada. I am interested in information retrieval (viz. text search), computer graphics and systems programming. I have worked for a short time in systems and graphics, building overlay. Then I spent a longer stretch of time building search tools and I wrote how search engines used as black boxes impede reproducibility in information retrieval research. In the write-up On tf-idf, I documented the provenance of search algorithms.