Websites:

[1]  http://www.howstuffwork.com

[2] http://www.discovercircuits.com

[3]  http://www.answers.com

[4]  http://www.radiotronix.com

[5] http://www.wineyardprojects.com

Magazines:

[1]  Electronics for you

[2]  Electrikindia

[3]  Let us go wireless Text Books:

[4]  Electrical applications with GSM by Morris Hamington

[5]  Satellite communication by Timothy Pratt

[6]  Mazidi

[7] 8085 datasheet