1) Digital Signal Processing
Digital Signal Processing, Principles, Algorithms, and Applications: John G. Proakis, Dimitris G. Manolakis
Digital Signal Processing: Andreas Antoniou
2) Microprocessors and Microcontrollers
3) Management Science
4) Instrumentation
5) Switch Gear and Protection
6) VLSI Design
Digital Signal Processing, Principles, Algorithms, and Applications: John G. Proakis, Dimitris G. Manolakis
Digital Signal Processing: Andreas Antoniou
2) Microprocessors and Microcontrollers
The 8051 Micro Controller Architecture, Programming and Applications By Kenneth J Ayala
3) Management Science
Aryasri : Management Science
4) Instrumentation
5) Switch Gear and Protection
6) VLSI Design