It depends on what you want to do with this - if you are simply building a menu from available entries in a database - I'd put the entries in an array, then do a for loop like:

print "<SELECT NAME=Company_Name>\n";
foreach (@company) {
    print "<OPTION VALUE=$_>$_\n";
}
print "</SELECT>\n";
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However, if you want to do something more complex, like are editing that Company_Name field by using a drop down menu it's a bit more complex, because you've got to distinguish which option should be checked.