00536nam a2200181Ia 450000500170000000800410001702000150005804000180007304100080009108200160009910000210011524500710013625000060020726000420021330000280025565000430028365000280032620230704133751.0210716s1993    xx            000 0 und d  a8120309251  cAIMIT LIBRARY  aeng  a004.65 BLAU  aBlack, Uyless D.  aData communications and distributed networks /cBy Uyless D Black.  a3  aNew DelhibPHI Learning Pvt Ltdc1993  axvi,426p. ;bPBc24 cm.  aData communications systems operations  aSoftware and data bases