Answer / fazil

DCS- distributed control system. widely used in large scale
industry. a system which control instruments for desired
process variables
ABB- is a multinational corporation headquartered in Zurich,
Switzerland, operating in robotics and mainly in the power
and automation technology areas

google it for definition, inquire here for more advance

Answer / ayaz

DCS is distibution control system to monitor and measuring .
and ABB is manufacturer company this is largest one of them.
ABB is company name like yakogawa etc...

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