https://apnews.com/article/compuserve-historic-building-ohio-gif-1c68258cf50217143205e4f05e27d79d > A Central Ohio building that once served as the global headquarters for CompuServe has been recognized with historic marker status by the state. > At its height in the 1990's, the pioneering tech company — one of the first to offer commercial internet services — was known by the public for online forums that offered news, message boards and data file transfers. The firm also introduced the GIF image format back in 1987.