00364nam a2200121 a 450000500170000002000150001708200130003210000250004524500730007026000340014330000150017749000500019220251203091648.0  a0139468986  a004bPIN  aPinkerton, John M.M.  aUnderstanding information technology: basic terminology and practice  aNew YorkbEllis Horwoodc1990  a150p, 22cm  aEllis Horwood books in information technology