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We found 1,222 contractors.

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Contractor	Zip
NATIONAL COMMITTEE FOR QUALITY ASSURANCE WASHINGTON, DC Professional, Scientific, and Technical Services	20005
NATIONAL CONFERENCE OF PUERTO RICAN WOMEN WASHINGTON, DC	20005
NATIONAL CONGRESS OF AMERICAN INDIANS OF THE UNITED STATES AND ALASKA INCORPORA WASHINGTON, DC Other Services (except Public Administration) : Professional Organizations	20036
NATIONAL CONSORT OF TASC PROGRAM ALEXANDRIA, VA Other Services (except Public Administration) : Professional Organizations	22301
NATIONAL COUNCIL ADVANCED MFG WASHINGTON, DC Administrative and Support and Waste Management and Remediation Services : All Other Support Services	20036
NATIONAL COUNCIL FOR COMMUNITY BEHAVIORAL HEALTHCARE ROCKVILLE, MD Professional, Scientific, and Technical Services : Other Management Consulting Services	20852
NATIONAL COUNCIL FOR GEOGRAPHIC EDUCATION WASHINGTON, DC	20009
NATIONAL COUNCIL FOR INTERNATIONAL VISITORS WASHINGTON, DC Other Services (except Public Administration) : Business Associations	20005
NATIONAL COUNCIL FOR SCIENCE AND THE ENVIRONMENT WASHINGTON, DC	20036
NATIONAL COUNCIL OF LA RAZA WASHINGTON, DC	20036
NATIONAL COUNCIL OF NEGRO WOMEN, THE WASHINGTON, DC Public Administration : Administration of Education Programs	20004
NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS, INC RESTON, VA Wholesale Trade : Book, Periodical, and Newspaper Merchant Wholesalers	20191
NATIONAL COUNCIL OF UNIVERSITY RESEARCH ADMINISTRATORS WASHINGTON, DC Educational Services : Professional and Management Development Training	20036
NATIONAL COUNCIL ON RADIATION PROTECTION AND MEASUREMENTS INC BETHESDA, MD Professional, Scientific, and Technical Services : All Other Professional, Scientific, and Technical Services	20814
NATIONAL COUNCIL ON THE AGING INC WASHINGTON, DC Other Services (except Public Administration) : Other Social Advocacy Organizations	20024
NATIONAL CRIMINAL JUSTICE ASSOCIATION WASHINGTON, DC Other Services (except Public Administration) : Civic and Social Organizations	20001
NATIONAL CYBER SECURITY ALLIANCE WASHINGTON, DC Public Administration : Administration of Education Programs	20036
NATIONAL DEFENSE INDUSTRIAL ASSOCIATION ARLINGTON, VA Other Services (except Public Administration) : Professional Organizations	22201
NATIONAL DEFENSE TRANSPORTATION ASSOCIATION ALEXANDRIA, VA Administrative and Support and Waste Management and Remediation Services : Convention and Trade Show Organizers	22304
NATIONAL DISABILITY RIGHTS NETWORK INCORPORATED WASHINGTON, DC Professional, Scientific, and Technical Services : Administrative Management and General Management Consulting Services	20002
NATIONAL ECOLOGICAL OBSERVATORY NETWORK INCORPORATED WASHINGTON, DC Construction : Site Preparation Contractors	20005
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION ARLINGTON, VA Professional, Scientific, and Technical Services : Marketing Research and Public Opinion Polling	22209
NATIONAL ENGINEERS WEEK FOUNDATION ALEXANDRIA, VA Educational Services : Educational Support Services	22314
NATIONAL ENVIROMENTAL BALANCING INC GAITHERSBURG, MD Other Services (except Public Administration) : Business Associations	20877
NATIONAL ENVIRONMENTAL EDUCATION AND TRAINING FOUNDATION IN WASHINGTON, DC Educational Services : Professional and Management Development Training	20008
NATIONAL ESTUARINE RESEARCH RESERVE ASSOCIATION WASHINGTON, DC Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	20001
NATIONAL FAMILY CARE GIVERS ASSOCIATION KENSINGTON, MD	20895
NATIONAL FATHERHOOD INITIATIVE GAITHERSBURG, MD Other Services (except Public Administration) : Other Social Advocacy Organizations	20877
NATIONAL FEDERATION OF THE BLIND BALTIMORE, MD	21230
NATIONAL FISH WLDLIFE FNDTION WASHINGTON, DC Public Administration : Administration of Conservation Programs	20036
NATIONAL FISHERIES INSTITUTE MC LEAN, VA Educational Services : Educational Support Services	22102
NATIONAL FOREST FOUNDATION INC WASHINGTON, DC Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	20007
NATIONAL FORUM FOR HEALTHCARE (5544) WASHINGTON, DC	20005
NATIONAL GEOGRAPHIC SOCIETY INCORPORATED WASHINGTON, DC	20036
NATIONAL GOVERNORS ASSOCIATION CENTER FOR BEST PRACTICES WASHINGTON, DC Professional, Scientific, and Technical Services : Other Management Consulting Services	20001
NATIONAL GOVERNORS ASSOCIATION CENTER FOR BEST PRACTICES WASHINGTON, DC Professional, Scientific, and Technical Services : Other Scientific and Technical Consulting Services	20001
NATIONAL GRANTS MANAGEMENT ASSOCIATION RESTON, VA Other Services (except Public Administration) : Professional Organizations	20190
NATIONAL GUARD ASSOCIATION OF THE UNITED STATES INC WASHINGTON, DC	20001
NATIONAL HEALTH COUNCIL INC WASHINGTON, DC Professional, Scientific, and Technical Services : Administrative Management and General Management Consulting Services	20036
NATIONAL HISPANIC COUNCIL ON AGING WASHINGTON, DC Other Services (except Public Administration) : Human Rights Organizations	20036
NATIONAL HISPANIC ENVIRONMENTAL COUNCIL ALEXANDRIA, VA Educational Services : Educational Support Services	22314
NATIONAL HISPANIC MEDICAL ASSOCIATION WASHINGTON, DC	20005
NATIONAL HISPANIC SUSTAINABLE ENERGY AND ENVIRONMENTAL COMPANY THE ALEXANDRIA, VA Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	22314
NATIONAL HISTORICAL BLACK COLLEGES AND UNIVERSITY RESEARCH NETWORK FOR HEALTH S BOWIE, MD	20720
NATIONAL HOSPICE AND PALLIATIVE CARE ORGANIZATION, INCORPORA ALEXANDRIA, VA	22314
NATIONAL INDUSTRIES FOR THE BLIND ALEXANDRIA, VA Retail Trade 45 : Office Supplies and Stationery Stores	22314
NATIONAL INFO STANDARD ORGANIZATION BALTIMORE, MD Information : Book Publishers	21201
NATIONAL INSTITUTE FOR PUBLIC POLICY FAIRFAX, VA Professional, Scientific, and Technical Services : Administrative Management and General Management Consulting Services	22031
NATIONAL INSTITUTE OF BUILDING SCIENCES WASHINGTON, DC Professional, Scientific, and Technical Services	20005
NATIONAL INSTITUTE OF GOVERNMENTAL PURCHASING, INC HERNDON, VA	20170
NATIONAL IRONWORKERS AND EMPLOYEES APPRENTICESHIP TRAINING AND JOURNEYMAN WASHINGTON, DC Construction : Structural Steel and Precast Concrete Contractors	20006
NATIONAL JOB CORPS ASSOCIATION INC ALEXANDRIA, VA Other Services (except Public Administration) : Business Associations	22314
NATIONAL LABOR COLLEGE, INC SILVER SPRING, MD Accommodation and Food Services : Hotels (except Casino Hotels) and Motels	20903
NATIONAL LATINA HEALTH NETWORK INCORPORATED WASHINGTON, DC Public Administration : Administration of Public Health Programs	20007
NATIONAL LEAGUE OF CITIES WASHINGTON, DC Public Administration : Administration of Education Programs	20004
NATIONAL LOW INCOME ENERGY CONSORTIUM ALEXANDRIA, VA Other Services (except Public Administration) : Other Social Advocacy Organizations	22312
NATIONAL MARINE SANCTUARY FOUNDATION SILVER SPRING, MD Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	20910
NATIONAL MEDICAL ASSOCIATION, INC WASHINGTON, DC Other Services (except Public Administration) : Professional Organizations	20001
NATIONAL MENTAL HEALTH ASSOCIATION INCORPORATED ALEXANDRIA, VA	22311
NATIONAL MINORITY AIDS COUNCIL, INC. WASHINGTON, DC Professional, Scientific, and Technical Services : Other Management Consulting Services	20009
NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC. ALEXANDRIA, VA Other Services (except Public Administration) : Industrial Launderers	22314
NATIONAL MULTICULTURAL INSTITUTE INCORPORATED WASHINGTON, DC	20008
NATIONAL NAVAL OFFICERS ASSOCIATION ALEXANDRIA, VA Other Services (except Public Administration) : Professional Organizations	22315
NATIONAL NETWORK TO END DOMESTIC VIOLENCE FUND WASHINGTON, DC Other Services (except Public Administration) : Other Social Advocacy Organizations	20003
NATIONAL OCEAN INDUSTRIES ASSOCIATION WASHINGTON, DC	20005
NATIONAL ORGANIZATION OF BLACK COUNTY OFFICIALS WASHINGTON, DC Public Administration : Other Justice, Public Order, and Safety Activities	20005
NATIONAL ORGANIZATION OF BLACK LAW ENFORCEMENT EXECUTIVES ALEXANDRIA, VA Educational Services : Professional and Management Development Training	22312
NATIONAL PACE ASSOC ALEXANDRIA, VA	22314
NATIONAL PARK FOUNDATION (INC) WASHINGTON, DC Public Administration : Administration of Conservation Programs	20005
NATIONAL PEACE CORPS ASSN WASHINGTON, DC Wholesale Trade : Book, Periodical, and Newspaper Merchant Wholesalers	20036
NATIONAL PLASTERING INDUSTRIES JOINT APPRENTICESHIP TRUST FUND LANDOVER, MD Professional, Scientific, and Technical Services : Administrative Management and General Management Consulting Services	20785
NATIONAL POLLUTION PREVENTION WASHINGTON, DC Professional, Scientific, and Technical Services : Environmental Consulting Services	20036
NATIONAL POSTDOCTORAL ASSOC WASHINGTON, DC Educational Services : Professional and Management Development Training	20005
NATIONAL PRESERVATION INSTITUTE ALEXANDRIA, VA Information : Other Sound Recording Industries	22307
NATIONAL PUBLIC RADIO, INC WASHINGTON, DC	20001
NATIONAL RECYCLING COALITION INCORPORATED WASHINGTON, DC Wholesale Trade : Recyclable Material Merchant Wholesalers	20005
NATIONAL REHABILITATION HOSPITAL WASHINGTON, DC Educational Services : Professional and Management Development Training	20010
NATIONAL RESTAURANT ASSOCIATION WASHINGTON, DC	20036
NATIONAL RETAIL FEDERATION, INC. WASHINGTON, DC	20004
NATIONAL RIFLE ASSOCIATION OF AMERICA FAIRFAX, VA Other Services (except Public Administration) : Civic and Social Organizations	22030
NATIONAL SCIENCE & TECHNOLOGIES MEDALS FOUNDATION WASHINGTON, DC Other Services (except Public Administration) : Civic and Social Organizations	20036
NATIONAL SCIENCE TEACHERS ASSOCIATION ARLINGTON, VA Other Services (except Public Administration) : Civic and Social Organizations	22201
NATIONAL SECURITY TRAINING INSTITUTE, INC CHANTILLY, VA Educational Services : Professional and Management Development Training	20151
NATIONAL SHERIFFS' ASSOCIATION ALEXANDRIA, VA	22314
NATIONAL SLEEP FOUNDATION WASHINGTON, DC	20005
NATIONAL SOCIETY OF BLACK ENGINEERS ALEXANDRIA, VA Information : All Other Publishers	22314
NATIONAL SOCIETY OF BLACK PHYSICISTS ARLINGTON, VA	22205
NATIONAL SOCIETY OF COLLEGIATE SCHOLARS WASHINGTON, DC	20006
NATIONAL SOCIETY OF PROFESSIONAL ENGINEERS ALEXANDRIA, VA	22314
NATIONAL SOCIETY OF THE DAUGHTERS OF THE AMERICAN REVOLUTION, THE WASHINGTON, DC Arts, Entertainment, and Recreation : Promoters of Performing Arts, Sports, and Similar Events with Facilities	20006
NATIONAL SPACE GRANT FOUNDATION, INC. (THE) WASHINGTON, DC	20001
NATIONAL STUDENT CLEARINGHOUSE INCORPORATED HERNDON, VA	20171
NATIONAL TRUST FOR HISTORIC PRESERVATION IN THE UNITED STATE WASHINGTON, DC Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	20036
NATIONAL UTILITY CONTRACTORS ASSOCIATION; FOUNDATION FOR EDUCATION AND RESEARCH ARLINGTON, VA Construction : All Other Specialty Trade Contractors	22203
NATIONAL VETERANS BUSINESS DEVELOPMENT CORPORATION WASHINGTON, DC Administrative and Support and Waste Management and Remediation Services : All Other Business Support Services	20006
NATIONAL VOLUNTARY ORGANIZATIONS ACTIVE IN DISASTER, INC. ARLINGTON, VA Health Care and Social Assistance : Emergency and Other Relief Services	22209
NATIONAL WILDLIFE REFUGE ASSOCIATION INCORPORATED WASHINGTON, DC Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	20007
NATIONAL YOUTH EMPLOYMENT COALITION WASHINGTON, DC	20036
NATL CAPITAL REVITALIZATION CORPORATION WASHINGTON, DC Other Services (except Public Administration) : Parking Lots and Garages	20006
NATURE CONSERVANCY, THE ARLINGTON, VA Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	22203
NATURESERVE ARLINGTON, VA Professional, Scientific, and Technical Services : Computer Systems Design Services	22209
NAVAL RESEARCH LAB WASHINGTON, DC Professional, Scientific, and Technical Services : Engineering Services	20375
NAVY FEDERAL CREDIT UNION VIENNA, VA	22180
NAVY LEAGUE BUILDING LLC, THE ARLINGTON, VA Information : Periodical Publishers	22201
NCB CAPITAL IMPACT ARLINGTON, VA Professional, Scientific, and Technical Services : Other Management Consulting Services	22202
NCMA FREE STATE CHAPTER MC LEAN, VA Other Services (except Public Administration) : Professional Organizations	22102
NEHEMIAH HOUSE INC BALTIMORE, MD Health Care and Social Assistance : Other Individual and Family Services	21237
NEIGHBORHOOD REINVESTMENT CORPORATION WASHINGTON, DC Professional, Scientific, and Technical Services : Other Management Consulting Services	20005
NETWORK CENTRIC OPERATIONS INDUSTRY CONSORTIUM INC VIENNA, VA	22181
NEWSEUM, INC. WASHINGTON, DC	20001
NISH VIENNA, VA Manufacturing 33 : Nonupholstered Wood Household Furniture Manufacturing	22182
NOBLIS INCORPORATED FALLS CHURCH, VA Professional, Scientific, and Technical Services : Engineering Services	22042
NOMA BUSINESS IMPROVEMENT DISTRICT WASHINGTON, DC Public Administration : Other Justice, Public Order, and Safety Activities	20002
NONPROFIT RISK MANAGEMENT CENTER WASHINGTON, DC Information : Book Publishers	20036
NOPCAS INCORPORATED WASHINGTON, DC	20017
NORSEMAN, INC. ELKRIDGE, MD	21075
NORTH AMERICAN ASSOCIATION FOR ENVIRONMENTAL EDUCATION WASHINGTON, DC Other Services (except Public Administration) : Professional Organizations	20036
NORTH EAST MIDWEST INSTITUTE WASHINGTON, DC Public Administration : Other General Government Support	20003
NORTHEAST MRYLND BALTIMORE, MD	21202
NORTHEASTERN AREA ASSOCIATION OF STATE FORESTERS WASHINGTON, DC	20001
NORTHERN VIRGINIA MEDIATION SERVICE FAIRFAX, VA Educational Services : Professional and Management Development Training	22030
NOVIKOV, NIKOLAY BETHESDA, MD	20814
NRECA INTERNATIONAL LIMITED ARLINGTON, VA Professional, Scientific, and Technical Services : Other Scientific and Technical Consulting Services	22203
NTL INSTITUTE FOR APPLIED BEHAVIORAL SCIENCE ALEXANDRIA, VA	22314
NUBIAN BENEVOLENCE ASSOCIATION INCORPORATED FALLS CHURCH, VA Other Services (except Public Administration) : Religious Organizations	22041
NUCLEAR REGULATORY COMMISSION, UNITED STATES ROCKVILLE, MD Public Administration : Regulation and Administration of Communications, Electric, Gas, and Other Utilities	20852
OAK RIDGE ASSOCIATED UNIVERSITIES INCORPORATED WASHINGTON, DC	20036
OCEAN CONSERVANCY, INC. THE WASHINGTON, DC Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	20006
OCEAN FOUNDATION, THE WASHINGTON, DC Other Services (except Public Administration) : Environment, Conservation and Wildlife Organizations	20036
OHKE CULTURAL NETWORK, INC HYATTSVILLE, MD Professional, Scientific, and Technical Services : All Other Professional, Scientific, and Technical Services	20782
ONE IN FOUR INC. CHEVY CHASE, MD Educational Services : Educational Support Services	20815
OPERATION LIFESAVER INCORPORATED ALEXANDRIA, VA	22314
OPTICAL SOCIETY OF AMERICA, INCORPORATED THE WASHINGTON, DC Other Services (except Public Administration) : Professional Organizations	20036
ORGANIZATION FOR ECONOMIC COOPERATION AND DEVELOPMENT WASHINGTON, DC Educational Services : Educational Support Services	20036
ORGANIZATION OF AMERICAN STATES WASHINGTON, DC Professional, Scientific, and Technical Services : Custom Computer Programming Services	20006
ORNITHOLOGICAL COUNCIL THE WASHINGTON, DC Professional, Scientific, and Technical Services	20006
OSCRE AMERICAS INCORPORATED WASHINGTON, DC Other Services (except Public Administration) : Professional Organizations	20006
OSTEOGENESIS IMPERFECTA FOUNDATION, INC. GAITHERSBURG, MD	20878
OXFORD RESEARCH INSTITUTE INCORPORATED NEW MARKET, MD Professional, Scientific, and Technical Services : Other Scientific and Technical Consulting Services	21774
P E SYSTEMS INCORPORATED FAIRFAX, VA Professional, Scientific, and Technical Services	22030
PACIFIC INSTITUTE FOR RESEARCH AND EVALUATION BELTSVILLE, MD Professional, Scientific, and Technical Services : Other Scientific and Technical Consulting Services	20705
PAN AMERICAN HEALTH ORGANIZATION INC WASHINGTON, DC	20037
PARA ESO LA PALABRA INCORPORATED WASHINGTON, DC	20018
PARALYZED VETERANS OF AMERICA WASHINGTON, DC	20006
PARTNERS FOR COMMUNITY SOLUTIONS WASHINGTON, DC Professional, Scientific, and Technical Services : Other Management Consulting Services	20024
PARTNERS OF THE AMERICAS INC WASHINGTON, DC Educational Services : Educational Support Services	20005
PARTNERSHIP FOR CHILD HEALTH CARE INCORPORATED THE ARLINGTON, VA Professional, Scientific, and Technical Services : All Other Professional, Scientific, and Technical Services	22203
PARTNERSHIP FOR PREVENTION INCORPORATED WASHINGTON, DC Professional, Scientific, and Technical Services : All Other Professional, Scientific, and Technical Services	20036
PARTNERSHIP FOR PUBLIC SERVICE, INC. WASHINGTON, DC Professional, Scientific, and Technical Services : Administrative Management and General Management Consulting Services	20005
PATRIOT'S TECHNOLOGY TRAINING CENTER INC CAPITOL HEIGHTS, MD Construction : All Other Specialty Trade Contractors	20743
PATTON HOWARD T ACCOKEEK, MD Arts, Entertainment, and Recreation : Independent Artists, Writers, and Performers	20607
PEDIATRIC NURSING CERTIFICATION GAITHERSBURG, MD	20877
PETER & JOHN RADIO FELLOWSHIP BALTIMORE, MD Other Services (except Public Administration) : Communication Equipment Repair and Maintenance	21227
PHARMACEUTICAL EDUCATION AND RESEARCH INSTITUTE INCORPORATED ARLINGTON, VA Educational Services : Colleges, Universities, and Professional Schools	22209
PILGRIM BAPTIST CHURCH WASHINGTON, DC Public Administration : Other General Government Support	20002
PIN POINTS INC WASHINGTON, DC Arts, Entertainment, and Recreation : Theater Companies and Dinner Theaters	20019
PINCHOT INSTITUTE FOR CONSERVATION WASHINGTON, DC	20036
PIPELINE RESEARCH COUNCIL INTERNATIONAL INCORPORATED ARLINGTON, VA Professional, Scientific, and Technical Services	22209
PLAYTIME PRODUCTIONS INCORPORATED ARLINGTON, VA Arts, Entertainment, and Recreation : Theater Companies and Dinner Theaters	22206
POINTS OF LIGHT FOUNDATION, INC. WASHINGTON, DC Other Services (except Public Administration) : Other Grantmaking and Giving Services	20005
POISON PREVENTION WEEK COUNCIL WASHINGTON, DC	20003
POPULATION REFERENCE BUREAU INCORPORATED WASHINGTON, DC Professional, Scientific, and Technical Services : Research and Development in the Social Sciences and Humanities	20009
POPULATION SERVICES INTERNATIONAL WASHINGTON, DC Manufacturing 31 : Bottled Water Manufacturing	20036
POSTSECONDARY ELECTRONIC STANDARDS COUNCIL WASHINGTON, DC Other Services (except Public Administration) : Other Similar Organizations (except Business, Professional, Labor, and Political Organizations)	20036
POTOMAC FORUM LTD POTOMAC, MD	20854
POTOMAC INSTITUTE POLICY STUDI ARLINGTON, VA Professional, Scientific, and Technical Services	22203
PRESIDENT AND DIRECTORS OF GEORGETOWN COLLEGE FOR GEORGETOWN WASHINGTON, DC	20001
PRESIDENT AND DIRECTORS OF GEORGETOWN COLLEGE FOR GEORGETOWN (3698) WASHINGTON, DC Educational Services : Colleges, Universities, and Professional Schools	20007
PRETRIAL SERVICES RESOURCE CENTER WASHINGTON, DC Information : Newspaper Publishers	20005
PREVENT CANCER FOUNDATION ALEXANDRIA, VA	22314
PRINCE GEORGE'S COMMUNITY COLLEGE UPPER MARLBORO, MD Professional, Scientific, and Technical Services : Custom Computer Programming Services	20774
PRINCE GEORGES COUNTY OF (0998) 1219835 LARGO, MD Other Services (except Public Administration) : Human Rights Organizations	20774
PROFESSIONAL DEVELOPMENT LEAGUE OF THE SENIOR EXECUTIVE ASSOCIATION WASHINGTON, DC	20002
PROFESSIONAL HOME CARE AND ASSOCIATES CORPORATION WOODBRIDGE, VA Health Care and Social Assistance : Other Residential Care Facilities	22193
PROGRESSIVE LIFE CENTER WASHINGTON, DC Public Administration : Administration of Human Resource Programs (except Education, Public Health, and Veterans' Affairs Programs)	20002
PROTESTANT EPISCOPAL CATHEDRAL FOUNDATION OF THE DISTRICT OF COLUMBIA WASHINGTON, DC Other Services (except Public Administration) : Funeral Homes and Funeral Services	20016
PROVIDENCE ADULT DAY CARE CENTER INC BALTIMORE, MD Health Care and Social Assistance : Services for the Elderly and Persons with Disabilities	21217
PUBLIC BROADCASTING SERVICE ARLINGTON, VA	22202
PUBLIC HEALTH DATA STANDARD BALTIMORE, MD Other Services (except Public Administration) : Professional Organizations	21205
PUBLIC HEALTH FOUNDATION WASHINGTON, DC	20005
PUBLIC SAFETY & CORRECTIONAL S BALTIMORE, MD Administrative and Support and Waste Management and Remediation Services : All Other Business Support Services	21215
PUBLIC TECHNOLOGY INCORPORATED WASHINGTON, DC Professional, Scientific, and Technical Services : Other Scientific and Technical Consulting Services	20004
PULMONARY HYPERTENSION ASSOCIATION INCORPORATED SILVER SPRING, MD Health Care and Social Assistance : All Other Miscellaneous Ambulatory Health Care Services	20910
RADIO TECHNICAL COMMISSION FOR MARITIME SERVICES INCORPORATED ARLINGTON, VA Other Services (except Public Administration) : Professional Organizations	22209
RAILROAD RESEARCH FOUNDATION WASHINGTON, DC Transportation and Warehousing 48 : Line-Haul Railroads	20001
RAILS TO TRAILS CONSERVANCY INCORPORATED WASHINGTON, DC Information : All Other Information Services	20036
READING IS FUNDAMENTAL, INC WASHINGTON, DC Educational Services : Educational Support Services	20009
REBECCA PROJECT FOR HUMAN RIGH WASHINGTON, DC	20009
REED ELSEVIER INCORPORATED WASHINGTON, DC	20036
RENEWABLE FUELS ASSOCIATION WASHINGTON, DC Other Services (except Public Administration) : Business Associations	20001
RESERVE OFFICERS ASSOCIATION OF UNITED STATES WASHINGTON, DC	20002
RESI RESEARCH AND CONSULTING BALTIMORE, MD Professional, Scientific, and Technical Services : Administrative Management and General Management Consulting Services	21204
RESNA INC ARLINGTON, VA	22209
RESOLVE INCORPORATED WASHINGTON, DC Professional, Scientific, and Technical Services : Administrative Management and General Management Consulting Services	20037
RESOLVE INCORPORATED (3696) BETHESDA, MD Professional, Scientific, and Technical Services : All Other Professional, Scientific, and Technical Services	20814
RESOURCES FOR THE FUTURE INCORPORATED WASHINGTON, DC Professional, Scientific, and Technical Services : Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	20036
RESTORE AMERICAS ESTUARIES ARLINGTON, VA	22203
RICHARD MERRIKEN COLUMBIA, MD Professional, Scientific, and Technical Services : Other Computer Related Services	21044
RIGHTS AND RESOURCES INSTITUTE WASHINGTON, DC Professional, Scientific, and Technical Services	20007
RTCA, INC WASHINGTON, DC	20036