Salem K. Velu B.T. Assistant, GGHSS, Thalaivasal, Salem Economics Domain Expert Dr. R.
Subramanian Professor (Retd) Soudeshwari Arts and Science College, Salem Reviewer Dr. J. Jeyaranjan Director, Institute of development alternatives, Chennai. Authors L.
Gowsalyadevi P.G. Assistant, GHSS, Thoppur, Dharmapuri K. Suresh P.G. Assistant, GBHSS, Pennagaram, Dharmapuri Dr.
M. Kumar P.G. Assistant, GHSS Madhanackainpatti, Salem S. Srinivasan P.G.
Assistant, GHSS B.Thurinjipatti, Dharmapuri M. Rajeswari P.G. Assistant, GHSS, Kumbinipettai, Vellore D.Vani, PG.Assistant, Malco.Vidyalaya. MHSS, Mettur Dam, Salem ICT D.
Naga Raj GHSS, Rappusal, Pudukkotai R. Venkatesan PUPS, Velliyanai, Karur EMIS Technology Team R.M. Satheesh State Coordinator Technical, TN EMIS, Samagra Shiksha. K.P.
Sathya Narayana IT Consultant, TN EMIS, Samagra Shikaha R. Arun Maruthi Selvan Technical Project Consultant, TN EMIS, Samagra Shiksha Academic Adviser & Expert Dr. P. Kumar Joint Director (Syllabus) SCERT, Chennai Academic Co-ordinators T.
Srinivasan Principal, DIET, Krishnagiri P. Suresh P. G.Assistant (History), GGHSS, Attur, Salem Art and Design Team Illustration R. Muthukumar V.
Vinoth Kumar B. Ravi Kumar Layout S. Ashok Kumar A. Adison Raj C.
Prasanth Petchimuthu Kailasam R. Balasubramani S. Adaikala Stephen Wrapper Design Kathir Arumugam In-House QC Rajesh Thangappan Jerald Wilson Co-ordinator Ramesh Munisamy This book has been printed on G.S.M. Elegant Maplitho paper.
Printed by offset at: Dr. A. Thennarasu Associate Professor & Head Govt. Arts College, Salem Dr.
K. Jayakumar Periyar E.V.R. College, Tiruchi Dr. J.
Murugan Arignar Anna Govt. Arts College Attur, Salem - - . . AM - - .