**Discovery of Quarks and Strong Interaction **

Talk given at Sree Krishna College, Guruvayur, Kerala on October 10, 2003.

** Understanding Hadron Structure **

Post M. Sc. Colloquium at Saha Institute, Kolkata (2001, 2002).

**Transverse Lattice QCD **

Nuclear Theory Seminar, Physics Department, Iowa State University, February
2003.

**Topological sector of two dimensional $\phi^4$
theory in Discrete Light
Cone Quantization **

SLAC Theory Group Seminar, June 8, 2005, Stanford University, U.S.A.

** Light Front
Dynamics: Structure and Scattering**

Talk presented at SINP, November
8, 2010.

** Towards Understanding Strong
Interactions **

Colloquium at SINP, Kolkata on December 14, 2016.