Before revision: These Toaster systems became very popular, primarily because at a cost of around US5,000, they could do much of what a 100,000 fully professional video switcher (such as an Evans Sutherland ) could do at that time.
After revision: These Toaster systems became very popular, primarily because at a cost of around US5,000, they could do much of what a 100,000 fully professional video switcher (such as an Evans Grass Valley switcher ) could do at that time.