Thank you, stevieb.

>>> You might be inclined to show the regex, a bit of surrounding code, and a sample of your data, as there may be more efficient/cleaner ways to do this instead of using one long regex.

Thanks. Here's my demonstrator program, which works properly (though perhaps not efficiently):

#!/usr/bin/perl

use strict;

my $string = join ( "\n", <DATA> );    #slurp it all into a string wit
+h newlines

my( $configuration, $memory, $serial_number ) =
   ( $string =~ /System Configuration:\s+([\w\s]*?)\n.*Memory size:\s+
+(\d+).*Chassis Serial Number\W+(\w+)/s );

print(
   "System Configuration: '$configuration'\n",
   "Memory Size:          '$memory'\n",
   "Serial Number:        '$serial_number'\n\n",
);

__DATA__
============================ FW Version ============================
la
la
la
System Configuration: Oracle Corporation sun4v SPARC Enterprise T5220
la
la

Memory size: 65408 Megabytes



Version
------------------------------------------------------------
 Sun System Firmware 7.4.7 2014/01/14 18:48


====================== System PROM revisions =======================
Version
------------------------------------------------------------
OBP 4.33.6.e 2014/01/14 15:19

Chassis Serial Number
---------------------
FDL10792DE
la
la
[download]

OUTPUT

System Configuration: 'Oracle Corporation sun4v SPARCE nterprise T5220
+'
Memory Size:          '65408'
Serial Number:        'FDL10792DE'
[download]