New Delhi: Recently, General Motors named Mary Barra as its new chief executive, making her the first woman to lead a major car manufacturing company in the United States. The 51-year-old — who previously served as Senior Vice-President for global product development — has spent 33 years at GM in a variety of manufacturing, engineering, and management positions, beginning as a student intern in 1980.Certainly, the role of women is increasing at the global level. Not doubt, being a female, chief executive officer, in a business world dominated by men, is challenging, as they often have greater scrutiny placed on them. Female CEOs serve as role models to career women starting out in the corporate world. And how they handle multiple responsibilities is compelling for corporate climbers.Read on to find out 23 female CEOs running the Fortune 500 companies:GENERAL MOTORS Annual revenue: $152 billionMarket value: $56 billionCEO: Mary Barra, taking over in January 2014 HEWLETT-PACKARD CO. Annual revenue: $112 billionMarket value: $52 billionCEO: Margaret Whitman, took over in September 2011 IBM CORP. Annual revenue: $105 billionMarket value: $192 billion CEO: Virginia Rometty, took over in January 2012 PEPSICO INC. Annual revenue: $65 billionMarket value: $126 billionCEO: Indra Nooyi, took over in October 2006ARCHER DANIELS MIDLAND CO. Annual revenue: $89 billion.Market value: $28 billionCEO: Patricia Woertz, took over in April 2006 LOCKHEED MARTIN CORP. Annual revenue: $47 billionMarket value: $45 billionCEO: Marillyn Hewson, took over in January 2013 DUPONT CO. Annual revenue: $35 billionMarket value: $57 billionCEO: Ellen Kullman, took over in January 2009 MONDELEZ INTERNATIONAL INC. Annual revenue: $35 billionMarket value: $60 billionCEO: Irene Rosenfeld, took over in June 2006 (company was known as Kraft Foods at the time) GENERAL DYNAMICS CORP.Annual revenue: $32 billionMarket value: $32 billionCEO: Phebe Nokakovic, took over in January 2013 TJX COMPANIES INC. Annual revenue: $26 billionMarket value: $44 billionCEO: Carol Meyrowitz, took over in January 2007 XEROX CORP. Annual revenue: $22 billionMarket value: $14 billionCEO: Ursula Burns, took over in July 2009 DUKE ENERGY CORP. Annual revenue: $20 billionMarket value: $49 billionCEO: Lynn Good, took over in July 2013 AVON PRODUCTS INC. Annual revenue: $11 billionMarket value: $8 billionCEO: Sherilyn McCoy, took over in April 2012 SEMPRA ENERGY Annual revenue: $10 billionMarket value: $21 billionCEO: Debra Reed, took over in June 2011 GUARDIAN LIFE INSURANCE OF AMERICA Annual revenue: $8 billion Market value: Not available (company is not publicly traded)CEO: Deanna Mulligan, took over in July 2011 CAMPBELL SOUP CO. Annual revenue: $8 billionMarket value: $13 billionCEO: Denise Morrison(*), took over in August 2011 MYLAN INC. Annual revenue: $7 billionMarket value: $16 billionCEO: Heather Bresch, took over in January 2012 INGREDION INC. Annual revenue: $7 billionMarket value: $5 billionCEO: Ilene Gordon, took over in May 2009 CH2M HILL COS. Annual revenue: $6 billionMarket value: Not available (company is not publicly traded)CEO: Jacqueline Hinman, taking over in January 2014 GRAYBAR ELECTRIC Annual revenue: $5 billionMarket value: Not available (company is not publicly traded)CEO: Kathleen Mazzarella, took over in June 2012 GANNETT CO. Annual revenue: $5 billionMarket value: $6 billionCEO: Gracia Martore, took over in October 2011 FRONTIER COMNUNICATIONS CORP. Annual revenue: $5 billionMarket value: $5 billionCEO: Maggie Wilderotter(*), took over in January 2006 YAHOO INC. Annual revenue: $5 billionMarket value: $41 billionCEO: Marissa Mayer, took over in July 2012 (*)Campbell Soup's Denise Morrison and Frontier's Maggie Wilderotter are sisters.