Mobile Communications Text Book-2nd Edition By JOCHEN SCHILLER
MicroProcessor TextBook-Ayala-The 8051 Microcontroller
Download R.S.Agarwal Quantitative Aptitude as one single file or Chapter Wise :)
"C" explained Excellently by Yashwant Kanetkar. Read it online or Download :)
Read Solutions side-by-side with Shakuntala Devi Puzzles to avoid that annoying scrolling for every puzzle to check the answer ;)
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Password for all password protected files is: http://csearchives.blogspot.in