Control key
Generally, the Meta key worked similar to Macintosh's Command key, in that when held down it modified letters and symbols into immediate commands (shortcuts). On these keyboards the Control key was placed closest to the space bar, then the Meta key outside Control. The space-cadet keyboard added the Super key outside Meta, and the Hyper key outside that. All these keys produced shortcuts (24 of them for every letter), but the Control ones were easiest to type and most popular, and the Meta ones second-easiest and thus second most popular. However, on most modern keyboards, the Control key is "farthest" from the space bar, reversing the convenience of shortcuts.