SIS4D However, IBM is currently maintaining quantum machines that universities and research firms can access via cloud interface to do things like solve complex equations or run physics simulations. Silicon microprocessors have relied on the traditional two-state transistor for more than 50 years, but inventions such as quantum computers are changing the game. This is because chip manufacturers are constantly finding new ways to etch transistors onto the silicon. Interest in the hobby peaked during the 1950s and 1960s, with AMT, Jo-Han, and Model Products Corporation (MPC) as the primary promotional manufacturers.|System Of A Down