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Batteries
Different types, sizes of batteries,internal resistance of batteries, chekking, solar cell

Sound & Music A brief study about sound and music,generation reproduction

Smart antenna technology
It is one of the latest technology for mobile communication systems for high capacity and incresed band width

Computer Installation Procedure
Sequential procedure for installing a computer system

RAM
Diffrent types of random access memories

Standard resistance values
Some standars values of resistors available in market

Standard capacitance values
Standard values of capacitors

Computer Hardware
Indepth coputer hardware info, the hardware central

Hand book of Optical through Air communication
68 page book contains Light theory Light detector emitter light system configutation, Processing theory. Receiver circuit and transmitter circuit

Key words

Batteries
Sound
Smart antenna technology
Computer installation procedure
Mobile communication
Antenna