$data eq "8000" or $data eq "0080"

the same as:

$data eq "8000" || $data eq "0080";

##</code><code>##

c:\@Work\Perl>perl -wMstrict -MO=Deparse,-p -le
"my $data = '8000';
 ;;
 if ($data eq '8000' or $data eq '0080') { print 'yes 1'; };
 if ($data eq '8000' || $data eq '0080') { print 'yes 2'; };
"
BEGIN { $^W = 1; }
BEGIN { $/ = "\n"; $\ = "\n"; }
use strict 'refs';
(my $data = '8000');
if ((($data eq '8000') or ($data eq '0080'))) {
    print('yes 1');
}
if ((($data eq '8000') or ($data eq '0080'))) {
    print('yes 2');
}
-e syntax OK

##</code><code>##

c:\@Work\Perl>perl -wMstrict -le
"my $data = '8000';
 ;;
 if ($data eq '8000' or $data eq '0080') { print 'yes 1'; };
 if ($data eq '8000' || $data eq '0080') { print 'yes 2'; };
"
yes 1
yes 2

##</code><code>##

c:\@Work\Perl>perl -wMstrict -MData::Dump -le
"my ($x, $y) = (4, 5);
 ;;
 my @ra = (1, 2, ! 3, $x, $y);
 dd \@ra;
 ;;
 my @rb = (1, 2, not 3, $x, $y);
 dd \@rb;
 ;;
 print qq{but \$x and \$y are still $x and $y};
"
Useless use of a constant (3) in void context at -e line 1.
Useless use of private variable in void context at -e line 1.
[1, 2, "", 4, 5]

[1, 2, ""]

but $x and $y are still 4 and 5