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n.
a process or series of acts especially of a practical or mechanical nature involved in a particular form of work; "the operations in building a house"; "certain machine tool operations"
n.
the act of presenting a play or a piece of music or other entertainment; "we congratulated him on his performance at the rehearsal"; "an inspired performance of Mozart's C minor concerto"
n.
the act of transacting within or between groups (as carrying on commercial activities); "no transactions are possible without him"; "he has always been honest is his dealings with me"