The BW format represents the black-and-white version of SGI (Silicon Graphics Image), a raster format created using Silicon Graphics workstation. Similar formats include RGB and RGBA. SGI and its related file extensions were first developed by Paul Haeberli and wereinitially released in mid-1990s. They are currently considered obsolete and difficult to open with regular image viewers.
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 GBR PCT MIF PLT PCL SVG WPG CIN DCX DIS HRU MTV PRC RAD PIC RLA QRT SGI XBM XPM SWF CAL PSD JXR BPG APNG DDS SVGZ CG4 FLIF