The College of Science in the Department of Mathematics discussed a seminar entitled The Cohomological Groups Of The Orlik-Solomon Algebra For Special Cases Of A Hypersolvable for postgraduate student Nuaman Yasin The seminar aims to study a structure of cohomology of special cases of arrangement and follow the behaviors of on the NBC-monomial basis of for special cases that studied previously also we will comput the cohomology of the Orlik-Solomon algebra of a hypersolvable arrangement for special cases.