'Broadcasting and Entertainment' => array('Walt Disney' => 'DIS'),
'Retail' => array('Wal-Mart' => 'WMT', 'Proctor & Gamble' => 'PG', 'The Home Depot' => 'HD'),
'Computers' => array('Microsoft' => 'MSFT', 'IBM' => 'IBM, 'Intel' => 'INTC', 'Hewlett-Packard' => 'HPQ', 'Cisco Systems' => 'CSCO')