00280nam a2200109Ia 4500008004100000082001700041100001700058245004100075250001200116260003400128300000800162240913s9999||||xx |||||||||||||| ||und||  a004.6  HAL/C  aFred Halsall 0aComputer Networking And The Internet  a5th Ed.  bPearson EducationaNULLc2009  a678