A
vector monitor or
vector display is a display device used for computer graphics up through the 1970s. It is a type of
CRT, similar to that of an early
oscilloscope. In a vector display, the image is composed of drawn lines rather than a grid of glowing pixels as in
raster graphics. The electron beam follows an arbitrary path tracing the connected sloped lines, rather than following the same horizontal raster path for all images. The beam skips over dark areas of the image without visiting their points.