These images can have irregular shapes and file sizes tend to be small. CorelDraw, Adobe Illustrator, Macromedia Freehand, and PowerPoint are all vector-based applications. In bitmapped images, squares of information are remembered in the file. Editing is difficult as you have to alter each square associated with the image. Bitmapped images have a certain number of squares of information in them so if the dimensions of the image were to change, so would the quality of the image.
File sizes tend to be large and the image is always a rectangle shape.
Adobe Photoshop, MS Paint, and scanning software are bitmap-based applications. Both types of applications may be able to import the other kind of file type. These image files however, cannot be changed in PowerPoint except for contrast and brightness. Some applications, like Photoshop, allow for both types of images to remain on separate layers in a single file and then can be edited in the same program by switching back and forth between the layers. Corel Presentations doesn't work with layers, but does allow editing of bitmap or vector images.