Gitwik is a reference library for instrument details to be used in repair and restoration and as an education and authentication resource. GitWik will document the wide group of large and small production-run instruments - anything of interest and likely to be researched. It will benefit from open source submission of content to address the rarity of some examples and to document the very large number of common instrument models and variants. As a wiki, submissions can come from any source but will be curated, edited and organized by a group of various experts responsible for regularizing the information to the best of their ability. Content will always be subject to further clarification and addition of details.