How can I open a file in its default application from the command line in OS X? How can I open a file in its default application from the command line?  

For example if I have a file foo.doc, can I type command ./foo.doc into the CLI and have that file open in Word?

Note: on my linux machine, I would use xdg-open but that doesn't work on my Mac.
Use:

open foo.doc


or, alternatively:

open -n foo.doc


to force it to open a new instance if one is already open for that app.