-oA— Save the results in “normal”, “grepable”, and XML formats simultaneously. This option will automatically append meaningful extensions (the other options do not do this).-oG— Save the results as “grepable” output. This is a compact format meant to automatically provide context when searched with grep.-oN— Save results as “normal” output. This is more-or-less what Nmap will print to STDOUT.-oX— Save the results as XML, designed to be importable by other applications.