SIL's principal contribution to linguistics has been the data that have been gathered and analyzed from over 1,000 minority and endangered languages, many of which had not been previously studied academically. SIL endeavors to share both the data and the results of analysis in order to contribute to the overall knowledge of language. This has resulted in publications on languages such as Hixkaryana and Pirahã, which have challenged the universality of some linguistic theories. SIL's work has resulted in over 20,000 technical publications, all of which are listed in the SIL Bibliography. Most of these are a reflection of linguistic fieldwork.