> It is a feature of *nix shells that an ending "&" in the command line will
> make the process forked. eg,
> 
> 2!:1 '/Applications/TextEdit.app/Contents/MacOS/TextEdit &'

Just to pick a nit, except for shell "built-ins", all command lines in Unix 
shells are "forked" -- executed within a separate process with a separate 
memory image (vfork notwithstanding).

The '&' tells the shell interpreter not to wait for the forked command to 
complete before proceeding on to the next command.  Otherwise, the shell waits 
for the forked command to complete, fail, or be interrupted.




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