Sony Electronic Publishing was formed in 1991 after Sony's North American division bought CSG Imagesoft from the CBS/Sony Group and renamed the company Sony Imagesoft. Sony Electronic Publishing became the parent company of Sony Imagesoft. Starting in 1994, Sony Imagesoft started to use the Sony Electronic Publishing name when they expanded to PC products. In 1995, Sony Electronic Publishing was closed due to Sony Imagesoft merging with the development branch of Sony Computer Entertainment into Sony Interactive Studios America.