Lockheed Martin Corp. will acquire PercepTek Inc., a provider of autonomous decision-making software technologies. Terms of the deal were not disclosed.

The acquisition is intended to strengthen Lockheed Martin’s capabilities in unmanned surveillance, company officials said. Lockheed Martin’s Missiles and Fire Control unit will manage the PercepTek business, they added.

PercepTek of Littleton, Colo., develops software that supplies autonomous navigation for unmanned ground vehicles, autonomous collaboration operations for unmanned aerial vehicles and automated surveillance for security applications. Among the company’s customers are the Army, Air Force and Defense Advanced Research Projects Agency.

Lockheed Martin of Bethesda, Md., ranks No. 1 on Washington Technology’s 2007 Top 100 list of the largest federal government prime contractors.