fg

Requiring at least ComputerCraft 1.6 and an advanced system to use, the fg command starts a given script in a new multishell tab. If no target script is specified, a new shell will launch in that tab instead. The new tab will take over the foreground of the system, whereas the old one can be selected from the top menu bar (which is only visible when multiple tabs are available).

See also: bg

Example
Launches the game worm in a new multishell tab.
Code	bg worm