LEADER 00862nam--2200301---450- 001 990003312210203316 005 20090916104628.0 035 $a000331221 035 $aUSA01000331221 035 $a(ALEPH)000331221USA01 035 $a000331221 100 $a20090916d1982----km-y0itay50------ba 101 $aeng 102 $aGB 105 $a||||||||001yy 200 1 $aIntroducing computerised telephone switchboards (PABXs) 210 $aMAnchester$cNational Computing Centre$d1982 215 $a92 p.$cill.$d21 cm 606 0 $aTelefonia 676 $a621.385 801 0$aIT$bsalbc$gISBD 912 $a990003312210203316 951 $a621.385 INT$b19425/CBS$c621.385$d00327499 959 $aBK 969 $aSCI 979 $aRSIAV6$b90$c20090916$lUSA01$h1046 996 $aIntroducing computerised telephone switchboards (PABXs$91122259 997 $aUNISA