00355nam a2200121Ia 4500008004100000041001200041082002200053100003500075245005700110260002500167300001200192650002900204231217s9999    xx            000 0 und d  aEnglish  a001.642  RAY;1  R  aRay, Ajoy Kumar Acharya, Tinku 0aInformation technology : principles and applications  c2004bPHIaNew Delhi  axxx+602  aInformation,technology,: