The geographic definition of "West Side" has also expanded over the years. Initially, it included the area west of Sawyer St, but as Oshkosh's business community has grown, WSA moved that western boundary further east, to include businesses on Knapp and Ohio Streets. Finally, a loose interpretation of "west side" now includes not only businesses that are physically located in that area, but also companies that conduct business on the west side of Oshkosh. Which means just about anyone with an interest in the growth and development of Oshkosh's commercial highway corridor is eligible for membership in West Side Association.