Alternatively to japhy's suggestion, move the declaration for @lines up above the while loop, and push the values of $lname, $fname, etc, onto the array during each iteration of the loop. As you have it written at present, @lines contains only the last set of values that was entered. So: 
my @lines;
my $quit = 0;
...
until ($quit ) {
  ...
  push( @lines, ... );
  $quit = ( $ans =~ /^n/i );
}
foreach (@lines) {
  ...
  write ADDRESS;
}

[download]
UPDATE: Another alternative, which would make this sort of program a lot easier to use: some Tk widgets. E.g. a pair of radio buttons for business vs. personal, four entry boxes for the names and address stuff, a "Store it" button, an "Exit" button... heck, why not a "Show list" button with a pop-up text widget, so the user can see who's on the list already. More features will come to mind (this can become addictive). You do have the Tk modules, don't you?

In reply to Re: Writing and writing and writing by graff
in thread Program only writes last information entered (was Writing and writing and writing) by ellem

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