1. Editorial

   EditorialNotes 02 October 2009 Pages: 631 - 632

2. W W Sawyer (1911–2008)

   • Vivek Monteiro

   Article-in-a-Box 02 October 2009 Pages: 633 - 635

3. Snippets of physics

   • T. Padmanabhan

   Series / Article 02 October 2009 Pages: 638 - 649

4. Aerobasics — An introduction to aeronautics

   • S. P. Govinda Raju

   Series / Article 02 October 2009 Pages: 650 - 666

5. Model checking

   • Madhavan Mukund

   General / Article 02 October 2009 Pages: 667 - 681

6. Computational lower bounds using diagonalization

   • M. V. Panduranga Rao

   General / Article 02 October 2009 Pages: 682 - 690

7. Pythagoras and Diophantus

   • Uwe Storch

   General / Article 02 October 2009 Pages: 691 - 703

8. The Landau theory of phase transitions: A mechanical analog

   • Rekha S. Raorane
   • Raghu Mahajan
   • Vijay A. Singh

   Classroom 02 October 2009 Pages: 704 - 713

9. The scientific enterprise

   • V. V. Raman

   Reflections 02 October 2009 Pages: 714 - 721

10. Classics

    OriginalPaper 02 October 2009 Pages: 722 - 735