This is a summary of selected contracts awarded by the federal government to companies and other vendors in Virginia, Maryland and the District.

Nova Research Co. in Bethesda won an $8,525,122 contract from the National Institute on Drug Abuse for a pilot testing program including models for AIDS prevention and women at risk.

RGI Inc. in Falls Church won a $6,830,679 contract from the Navy for research support to evaluate and test personnel selection instruments.

Environmental Technology Group Inc. in Baltimore won a $6,471,360 contract from the Navy for chemical agent detector units and chemical agent detector replacement sensor modules.

George Hyman Construction Co. in Bethesda won a $6,156,788 contract from the Navy for the second phase of construction on a headquarters building at the Naval Intelligence Center in Suitland.

Moshman Associates Inc. in Bethesda won a $5,808,487 contract from the Public Health Service for general research support.

Applied Environmental Health & Safety Inc. in Reston won a $5 million contract from the Army for industrial hygiene support services.

C-Cubed Corp. in Alexandria won a $4,679,973 contract from the Navy for architectural and engineering services.

Eagen, McAllister Associates Inc. in Lexington, Md., won a $4,500,442 contract from the Navy for air traffic control technical and management services.

Orkand Corp. in Silver Spring won a $4,498,775 contract from the National Cancer Institute to research clinical data management.

Network Solutions in Herndon won a $4,466,566 contract from the Air Force to purchase hardware and software.

Questech Inc. in Falls Church won a $4,157,880 contract from the Air Force for experimental, development, test and research work.

Century Technologies Inc. in Silver Spring won a $4,059,044 contract from the Navy for ADP facility operation and maintenance services.

Arinc Research Corp. in Annapolis won a $4,005,630 contract from the Army for engineering technical services.

Network Solutions in Herndon won a $3,726,225 contract from the Air Force for a Sentinel Aspen II training system.

Jones and Wood Inc. in Washington won a $3,417,000 contract from the National Park Service for South Ground Barriers.

DCS Corp. in Alexandria won a $2,908,282 contract from the Navy for advanced electro-optical infrared engineering and technical services.

RAI Inc. in Jessup, Md., won a $2,496,806 contract from the Agency for International Development for warehouse and supply management support.

Powell Adams & Rinehart in Washington won a $2,360,176 contract from the Federal Emergency Management Agency for civil defense public information materials.

Jones Chemicals Inc. in Milford, Va., won a $2,108,442 contract from the Treasury Department to supply a sodium hydroxide solution.

Falcon Microsystems Inc. in Landover won a $1,524,588 contract from the Justice Department for executive workstations, desktop PCs and peripherals.

Radiation Systems Inc. in Sterling won a $1,524,188 contract from the National Oceanic and Atmospheric Administration for antennae.

Decision Systems Technologies Inc. in Greenbelt won a $1,488,697 contract from the Navy for experimental, development, test and research work.

Delta Chemical Corp. in Baltimore won a $1,343,000 contract from the Army to supply aluminum sulfate.

Roy Weston Inc. in Washington won a $970,726 contract from the Treasury Department for environmental compliance services.

Westinghouse Electric Corp. in Baltimore won a $950,000 contract from the Air Force to research technology demonstrations.

Macro Systems Inc. in Silver Spring won an $889,187 contract from the Agriculture Department for research.

Contel Federal Systems in Chantilly won an $864,689 contract from the Air Force to research environmental tasking.

Bendix Field Engineering Corp. in Columbia, Md., won an $816,300 contract from the Navy for antenna system testing and upgrade services.

ARC Professional Services Group in Rockville won a $755,855 contract from the Prospective Payment Assessment Commission for computer support services.

Radan Systems Inc. in Columbia, Md., won a $750,000 contract from the Agency for International Development for financial management services.

Westinghouse Electric Corp. in Baltimore won a $735,322 contract from the Air Force to research radar applications.

Raymond Corp. in Rockville won a $634,629 contract from the Army for a mechanized material-handling system.

Fannon Petroleum Services Inc. in Alexandria won a $621,555 contract from the Defense Fuel Supply Center for fuel oil.

Amtrac Railroad Contractors of Maryland in Williamsport, Md., won a $617,000 contract from the Army for railroad repairs.

Computer Sciences Corp. in Calverton, Md., won a $587,864 contract from the U.S. Geological Survey Office for cartographic software services.

Contel Federal Systems in Chantilly won a $545,000 contract from the Air Force to research environmental efforts.

Circle Releasing Corp. in Washington won a $510,000 contract from the Navy to lease motion pictures.

AAI Corp. in Hunt Valley, Md., won a $487,439 contract from the Air Force to modify battery packs.

J.A.K. Construction Co. in Baltimore won a $479,000 contract from the Army to modify a building, laboratories and test chambers.

The University of Maryland at College Park won a $460,482 contract from the Army for research.

BDM International Inc. in McLean won a $449,966 contract from the Navy for technical and analytical support to the Defense Investigative Service.

Scientech Inc. in Rockville won a $427,137 contract from the Nuclear Regulatory Commission for technical assistance on nuclear power plant licensing.

Image Glass Inc. in Gaithersburg won a $424,950 contract from the Army to replace doors.

B&M Line Construction Inc. in Bel Air, Md., won a $348,413 contract from the Army for electrical power.

American Systems Corp. in Chantilly won a $336,450 contract from the Air Force to research Sentinel Bright II engineering changes.

Automated Systems and Programming in Silver Spring won a $285,988 contract from the Air Force for research.

International Business Machines Corp. in Manassas won a $284,595 contract from the Air Force for computer research.

W.C. Spratt Inc. in Fredericksburg, Va., won a $279,800 contract from the Navy to repair storm drain discharge outfalls at Quantico, Va.

Jones Chemicals Inc. in Milford, Va., won a $271,320 contract from the Army for liquid chlorine.

RJO Enterprises Inc. in Lanham won a $263,694 contract from the Air Force for engineering services.

Martin Marietta Corp. in Baltimore won a $260,337 contract from the National Aeronautics and Space Administration for research on composite materials.

Motorola Inc. in Landover won a $220,983 contract from the Navy for communications equipment.

Unocal Chemicals in Baltimore won a $205,960 contract from the Navy for propylene glycol.

Chemstone Corp. in Strasburg, Va., won a $201,600 contract from the Army for quicklime pebbles.

ICL Retail Systems in Falls Church won a $107,615 contract from the U.S. Postal Service for point-of-sale terminals and back-office systems.