    Sentence 4: what did. Distributed. Adaptive Message Glock  [Switching do    Sentence 2: Starting in the late 49505, American computer  fcentist Paul Garan developed, the concept Distributed  Adaptive Message Block Switching with the goal to provide  a fault-tolerant, e@icient routing method for  f'ecommunication messages as part of a research progran  at the RAND Corporation, funded by the US Department o€  Defense.