The Unisys Corp. will plead guilty in federal court to three counts of labor mischarging on a $9.2 million Army contract in Arizona, a company spokesman says.

The contract involves administrative and computer work for the Army Information Systems Command at Fort Huachuca, Ariz. The case is not related to the ongoing Pentagon bribery investigation, in which Unisys also has been mentioned although no charges have been filed.The Unisys-Army probe is one of three federal investigations, outside of the Pentagon case, made public in a July 19 letter from Unisys Chairman W. Michael Blumenthal to employees.