The BS image format is associated with the Printfox/Pagefox software programs created for the Commodore 64 brand of computers in the 1980s. Commodore 64 was one of the first highly popular models of home computers and Printfox/Pagefox programs were used as desktop publishing applications. Some of their available features included image processing and text formatting. The BS image format is currently considered obsolete and rare, so you won't find many image viewers which can open it.
The quick and simple way to handle your files is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch conversions. As you will soon realize, reaConverter will help you avoid spending countless hours trying to figure out how to convert multiple BS files as once.
JPEG JPG PNG GIF TIFF TIF BMP ICO EMF WMF AI PDF EPS PS EPI WEBP WEBPLL JP2 PCX TGA DWG DWF DXF DGN WMZ CGM DRW SHP GBR PCT MIF PLT PCL SVG WPG CIN DCX DIS HRU MTV PRC RAD PIC RLA QRT SGI XBM XPM SWF CAL FAX FITS PSD PGM JXR BPG APNG DDS SVGZ CG4 FLIF AVIF