Like the famous hand-held networks provided today, the first commercially effective residence video game were systems created to play a solitary game. Most of these games were arranged around the ball and paddle concept. Normally the network permitted a couple of variations on the exact very same motif. Instances of this sort of network are the Entex Tele-Pong and the Coleco Telstar. Such games are called DEDICATED networks, suggesting that they played one or at the most, 2 various games. These committed systems had memory circuits that kept the game guidelines prepped to play when the electric power came on. Later, devoted networks gave way to CARTRIDGE networks, which permitted any sort of number of games to be played on the very same unit, making use of a memory circuit set up inside a cartridge.