144 Spring Street LLC

Abington Friends School

Adobe, Inc.

Albert Einstein Medical Center

Allegheny District

American Red Cross

American Society for Testing and Materials

American Telephone & Telegraph (AT&T)

Apple Inc.

Aristech Corporation

Arizona State University

Army Corps of Engineers

Arup

Avenue of the Arts, Inc.

Bard College at Simon’s Rock

Bensalem Township, Pennsylvania

Bev-O-Matic Corporation

Blair Academy

Bloomsburg University

Blue Bottle Coffee Company

Board of Park Commissioners

Borough of Conshohocken, Pennsylvania

Bowling Green State University

Brooklyn, New York

Bryn Athyn College

Bucknell University

Bucks County Free Library

Buena Vista Land Corporation

Burroughs Corporation

California Institute of Technology

Capitol Commercial Corporation

Carnegie Mellon University

Catholic University of America

Caymus Suisun Winery

CBRE Group, Inc.

Cell-Bio Group Pharmaceuticals

Central Office, Washington, DC

Century Federal

Cerdec Corporation

CertainTeed/St. Gobain Corporation

Chatham College

Chestnut Hill Hospital

China Vanke Co.

Citizens Bank

City National Bank

City of Bellevue, Washington

City of Camden, New Jersey

City of Huntington, West Virginia

City of Johnstown, Pennsylvania

City of Newport Beach, California

City of Paterson, New Jersey

City of Philadelphia, Pennsylvania

City of Pittsburgh, Pennsylvania

City of Pleasant Hill, California

City of Pottsville, Pennsylvania

City of Seattle, Washington

City of Wilkes-Barre, Pennsylvania

Clarion University

Clarkson University

Clearwater Conservancy

Colby College

Colorado School of Mines

Columbia Catholic Housing, Incorporated

Commonwealth of Pennsylvania

Community College of Allegheny County

Contour Packaging Corporation

Coppin State College

Cornell Iron Works

Cornell University

Corning Museum of Glass

Corning, Inc.

Corporation of the Roman Catholic Clergymen

County of Bucks, Pennsylvania

County of Cumberland, Pennsylvania

County of Luzerne, Pennsylvania

County of Wyoming, Pennsylvania

Cuyana

Dartmouth College

Daxus

Delaware County Community College

Delaware River and Bay Authority

Department of City Planning

Department of Engineering and Construction

Department of Housing and Urban Development

Department of Public Property

Department of Recreation

Department of the Air Force

Department of Transportation

Digital Video Productions, Incorporated

Dorr-Oliver, Incorporated

Drexel University

Duke University

Dwight Englewood School

East Carolina University, School of Dental Medicine

Elan Communications

Elmira College

Emma Willard School

Everlane

Expedia, Inc.

Fagersta Steels Corporation

Fast Retailing

Finger Lakes Museum

First Eastern Bank

First Pennsylvania Bank

First Valley Bank

Florida State University

FMJ Corp

Franklin First Federal

Franklin Institute

Friends of Mountain Lake Park Playground

G100 Companies

Geisinger Medical Center

General Services Administration

George Mason University

Georgia Institute of Technology

Georgian Court University

Germantown Friends School

Gettysburg College

Gialina Restaurant

Gill/St. Bernard’s School

Gimbel’s Department Stores

Girard Bank

Girl Scouts of Greater Philadelphia

Grand Teton National Park Foundation

Greater Pittsburgh International Airport

Greenhill School

Hanover Bank of Pennsylvania

Harper and Row

Harrisburg International Airport

Harrisburg Parking Authority

Harry Major Machine Company

Haverford College

Hawk Mountain Sanctuary

Hawley Silk Mill

Hermann Park Conservancy

Historical Society of Western Pennsylvania

Howard Hughes Corporation

Huntsville Golf Club

IBM

InterMetro Industries Corporation

International Brotherhood of Electrical Workers

Jerusalem Venture Partners

Johns Hopkins University

Kaiser Family Foundation

Keating Development Corporation

King County Library System

King’s College

Kohlberg Kravis Roberts (KKR)

La Petite Boulangerie

La Salle University

Lafayette College

Lehigh University

Liberty Property Trust

Liquid Carbonic Corporation

Long Island Jewish Hospital

Loyola University Maryland

Luzerne County Community College

M. Berger Company

MacLean Grove and Company

Marywood University

Mellon Bank

Mercantile Stores, Incorporated

Mercy Hospital

Midwood Investment & Development

Mills College

Misericordia University

Montgomery County Community College

Mount Saint Mary’s College

Mountainside Northstar

National Park Service

NeXT Computer Corporation

Nordic Choice Hotels

Nu Skin Enterprises

Odin Property

Penn’s Woods Girl Scout Council

Pennsylvania Higher Education Assistance Agency

Pepsico

Philadelphia Health Maintenance Corp

Philadelphia Saving Fund Society

Phoenix Manufacturing Company

Picker Chemical Company

Pittsburgh Parks Conservancy

Pixar Animation Studios

Pocono Environmental Education Center/National Park Service

Princeton University

Ramapo College of New Jersey

Reading Real Estate Company

Reformation

Rensselaer Polytechnic Institute

Rochester & Pittsburgh Coal Company

Rochester Institute of Technology

Rodale Institute

Rouse Company

Royal Oil and Gas

Royer Foundry and Machine Company

Rutgers, State University of New Jersey

Sacred Heart Hospital

Salisbury School

Salisbury State University

Sandvik Incorporated

Schering Plough Corporation

School of Dental Medicine, University of Pennsylvania

Scranton School District

Seattle Public Library

Sheraton Hotels

Siebel Systems

Sigma Xi, The Scientific Honorary Society

Silver Bay Association

Smith College

Square, Inc.

St. Mary’s College of Maryland

Stahl Organization

State University of New York

Sterling Industrial Corporation

Stressteel Corporation

Su Development

Sun Petroleum Products Corporation

Susquehanna County Housing Authority

Susquehanna University

Syracuse University

Temple B’nai B’rith Housing

Temple University

The Agnes Irwin School

The Biondo Group, LLC

The Catholic University of America

The Lawrenceville School

The Local Vine

The Ohio State University

The Pennsylvania State University

The Pennsylvania State University, Erie, The Behrend College

The Pennsylvania State University, Harrisburg

The Pennsylvania State University, Hazleton

The Pennsylvania State University, University Park

The Pennsylvania State University, Wilkes-Barre

The Walt Disney Company

Thomas Jefferson University and Hospital

Tishman Speyer

Tonewood Brewing

Toombs Development Company

Township of Bernards, New Jersey

Towson State University

Toyota

Tredyffrin Township Administration

Trinity College

Tunkhannock Area School District

Turtle Bay Exploration Park

Under Armour

UNISYS

United States Government

United States Postal Service

University of Arkansas

University of California, Davis

University of California, Los Angeles

University of California, Riverside

University of California, San Diego

University of California, San Francisco

University of California, Santa Cruz

University of Colorado

University of Florida

University of Illinois at Urbana-Champaign

University of Maryland, Baltimore

University of Nevada, Las Vegas

University of North Carolina, Chapel Hill

University of Pennsylvania

University of Pittsburgh

University of Puget Sound

University of Scranton

University of Virginia

University of Washington

University of Wisconsin, Milwaukee

Vermont Institute of Natural Science

Veterans Administration

Voyageur du Temps

Waldorf School of Pittsburgh

Washington University in St. Louis

WBRE Television

WDAU Television

Western Pennsylvania Conservancy

Westinghouse Corporation

Westinghouse Elevator Corporation

Wheeling Jesuit College

Wilkes University

Wilkes-Barre Area School District

Wilkes-Barre Industrial Fund

Wilkes-Barre, Pennsylvania

Williams College

Winchester Thurston School

Women’s Center and Shelter of Greater Pittsburgh

Women’s Shelter of the Delaware Valley

Woodlynde School

Woodrow Wilson School, Princeton University

Wyoming Historical and Geological Society

Wyoming Seminary

Wyoming Valley West School District

Yale University

Zoological Society of Philadelphia