Raster printing refers to the method of printing which uses the raster image processor. The raster printing usually produces a raster image called a bitmap.
Raster.
raster
Hermann Raster was born in 1827.
Hermann Raster died in 1891.
Raster Blaster happened in 1981.
Raster-Noton was created in 1996.
Raster Blaster was created in 1981.
Photoshop is a raster image editor. Raster and Bitmap are two words for the same thing, so Photoshop is raster or Bitmap image editor, somewhere you will see raster, somewhere bitmap as explanation but it is basically same thing. Photoshop is primarily designed to work with bitmap images which are raster images in other words.
example of raster scane disply
Illustrator is a vector based program that can export raster images.
Photoshop is raster based but you can work with vector objects in Photoshop. Why is raster based is question for founder Mr. Thomas Knoll not for public because we can not answer this question. Maybe because this world need raster based software.