Initially a PDP-8 based system , the DC was upgraded to use PDP-11 hardware and a Remote Data Concentrator ( RDC ) was developed that used LSI-11 hardware that connected back to a DC over a synchronous data circuit .
ADV DET PROPN VERB NOUN , DET PROPN AUX VERB PART VERB PROPN NOUN CCONJ DET PROPN PROPN PROPN ( PROPN ) AUX VERB DET VERB PROPN NOUN DET VERB ADV ADP DET PROPN ADP DET ADJ NOUN NOUN .