William Dana Atkinson was an American computer engineer, computer programmer and photographer. Atkinson worked at Apple Computer from 1978 to 1990. Some of Atkinson's noteworthy contributions to the field of computing include Macintosh QuickDraw and Lisa LisaGraf, regions, marching ants, the menu bar, the selection lasso, MacPaint (FatBits), HyperCard, Atkinson dithering, and the PhotoCard application program.