Longshadow wrote:
The original reason for the screen saver was for CRT (Cathode Ray Tube) displays. If one non-changing image was left on the screen for a very extended time, it would eventually "burn" the image into the phosphorous coating on the inside of the face of the CRT, and you could see a ghost image when the CRT was turned off.
So you were "saving" your screen.
Plasma TVs had the same problem.