whhen it comes to regions and formats the United States is one big region/country.
the ENTIRE US uses region 1 as a standard.
the ENTIRE US uses NTSC as a format.
dvd burners are only region locked (and even then you get 5 changes) The region may come as unspecified or it may come already as region 1. you'll find out when you put your first disc in.
computer drives don't have to worry about the format (PAL vs. NTSC) Consoles do.