Maybe something like this (if I understand your "append them to corresponding list" correctly): 

#!/usr/bin/perl -w
use strict;

my (@a, @b, @c, @d, @e, @f, @g);

while (my $Line = <DATA>) {
    
    my @v = split(/\t/, $Line);
    
    for my $ar ( \(@a, @b, @c, @d, @e, @f, @g) ) {
        my $v = shift @v;
        $v = "NA" unless $v =~ /([A-Za-z0-9-_]+)/;
        push @$ar, $v;
    }
}

use Data::Dumper;

print Dumper \(@a, @b, @c, @d, @e, @f, @g);

__DATA__
a    b    c    d    .    f    g
A    B    C    .    E    F    G

[download]

Output: 

$VAR1 = [
          'a',
          'A'
        ];
$VAR2 = [
          'b',
          'B'
        ];
$VAR3 = [
          'c',
          'C'
        ];
$VAR4 = [
          'd',
          'NA'
        ];
$VAR5 = [
          'NA',
          'E'
        ];
$VAR6 = [
          'f',
          'F'
        ];
$VAR7 = [
          'g
',
          'G
'
        ];

[download]

In reply to Re: Short version of database push for multiple variables by Eliya
in thread Short version of database push for multiple variables by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.