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Michael Sokolski (September 25, 1926 – June 13, 2012) was a Polish-born American design engineer.Sokolski was the inventor [1] of the Scantron OMR scanner, used to scan and grade forms on which students mark answers to academic multiple choice test questions.
A port scanner is an application designed to probe a server or host for open ports. Such an application may be used by administrators to verify security policies of their networks and by attackers to identify network services running on a host and exploit vulnerabilities.