00491nam a2200157Ia 4500003000900000008004100009020001800050040001600068080001500084100001600099245012400115260004000239300001500279650002000294650001900314IN-BaIIA211028s9999    xx            000 0 eng d  a0-8359-1230-2  cIIA Library  a681.3bBLA  aBlack, U. D 0aData communications, networks and distributed processingcU. D. Black                                                    aVirginiabReston Publicationsc1983  axvi, 446p.  aData processing  aNASA thesaurus