Anyone who writes a book enjoys the direct and indirect assistance of many people. I would especially like to thank the late Jeff Jones, the first accuracy checker for this text. He worked every example and provided valuable editorial suggestions. Rosanna Templin and Jessica Daugherty typed most of the manuscript and solutions. Melissa Savage also helped to type and scan some material. Not only did they do this with speed and efficiency, but their experience with this difficult material made my job so much easier. Special thanks go to Alan Herweyer for preparing the Solutions Manual.

The author and publisher gratefully acknowledge the assistance of many talented reviewers and contributors. Allan Hymers, of Scarborough, Ontario, contributed several hundred problems and applications. The following reviewers also submitted applications for the text:
Calvin Holt, Franklin, Virginia
Roberta Laine, West Bend, Wisconsin
Frank Weeks, Gresham, Oregon
Natalie Woodrow, Sweetwater, Texas

The following instructors provided valuable criticism during several review stages:
Haya Adner, Queensborough Community College, Bayside, New York
Doris Bratcher, Northwest Iowa Technical College, Iowa
Granville Brown, Grand Rapids Community College, Grand Rapids, Michigan
Ronald Bukowski, Johnson Technical Institute, Scranton, Pennsylvania
Ed Champy, Northern Essex Community College
Barbara Cribbs, Start State Community College of Technology, Canton, Ohio
Bill Ferguson, Columbus State Community College, Columbus, Ohio
Maggie Williams Flint, Northeast State Technical Community College, Blountville, Tennessee
Marion Graziano, Montgomery County Community College, Blue Bell, Pennsylvania
Chuckie Hairston, Wake Technical Community College, Raleigh, North Carolina
Henry Hosek, Purdue University, Calumet, Indiana
David Hutchinson, Mohawk College of Technical and Applied Arts, Hamilton, Ontario
Allan Hymers, Centennial College, Scarborough, Ontario
Stanley Koper, Triangle Tech, Belle Vernon, Pennsylvania
Larry Lance, Columbus State Community College, Columbus, Ohio
Jean-Marie Magnier, Springfield Technical Community College, Springfield, Mass.
Tom McCollow, DeVry Institute of Technology, Phoenix, Arizona
Jeff Moore, Volunteer State Community College, Gallatin, Tennessee
Peter Moreno, ITT Technical Institute, San Bernardino, California
Robert Opel, Waukesha County Technical College, Waukesha, Wisconsin
Steven B. Ottman, Southeast Community College, Nebraska
Gordon Schlafmann, Western Wisconsin Technical College
Rita Shillabeer, University at Alberta, Canada
Cathy Vollstedt, North Central Technical College, Schofield, Wisconsin
Anita Walker, Asheville, North Carolina
Phyliss Wiegman, Ivy Tech, Fort Wayne, Indiana
Nancy Woods, Des Moines Area Community College, Des Moines, Iowa

During several rigorous accuracy checks, the following professionals offered many helpful suggestions to the text and solutions:
C. Lea Campbell, Lamar University, Port Arthur, Texas
Gerry East, Southwestern Oklahoma State University, Weatherford, Oklahoma
Joseph P. Everett, Chattanooga State Technical College, Chattanooga, Tennessee
Diane Ferris, Portland Community College, Portland, Oregon
Alan Herweyer, Chattanooga State Technical College, Chattanooga, Tennessee
Barbara Karp, Newcastle, Indiana
Amy Relyea, Miami University, Oxford, Ohio
Gordon Schlafmann, Western Wisconsin Technical College
Randall Sowell, Central Virginia Community College, Lynchburg, Virginia
John Wisthoff, Anne Arundel Community College, Maryland
George Wyatt, Rensselaer Polytechnic Institute, Troy, New York
Ron Zielke, Ohio Dominican University, Columbus, Ohio