558 TUGboat, Volume 12 (1991), No. 3 -Proceedings of the 1991 Annual Meeting

Participants at the Malcolm W. Clark Michael Doob Polytechnic of Central University of Manitoba 12th Annual TUG Meeting London Winnipeg, Manitoba, I July 15-18, 1991 Dedham, Massachusetts I London, England Canada David M. Cobb Michael J. Downes * indicates an exhibit01 Harriet B. Borton SAIC American Mathematical Rensselaer Polytechnic Oak Ridge, Tennessee Society Institute Providence, Rhode Island Ted Adamczyk Troy, New York Donald Cohn New York, New York Boston, Massachusetts Colleen Brosnan Ken Dreyhaupt Springer-Verlag New York, Robert A. Adarns Prentice Hall Daniel Comenetz Inc. University of British Englewood Cliffs, New Belmont, Massachusetts New York, New York Columbia Jersey Jacquie Commanday Vancouver, British Houghton-Mifflin Company Allen R. Dyer Columbia, Canada Mimi Burbank Boston, Massachusetts Florida State University Computer Law Laboratory Clifford Alper Tallahassee, Florida A.C. Conrad Ellicott City, Maryland TEX Users Group Menil Foundation Teresa A. Ehling Providence, Rhode Island Karen Butler Houston, Texas rn Users Group MIT Press Robine Andrau Providence, Rhode Island Raylene Cooper Cambridge, Massachusetts PWS-KENT Publishing Lawrence Livermore Company William Butler National Laboratory Victor L. Eijkhout Boston, Massachusetts T@ Users Group Livermore, California University of Illinois Providence, Rhode Island Urbana, Illinois Geraldine Aramanda Ray Cowan Menil Foundation Katherine Butterfield Stanford Linear Accelerator Bennet Fauber Houston, Texas University of California, Center Impressions - A Division of Berkeley Stanford, California Edwards Brothers Dennis Arnon Ann Arbor, Michigan Xerox Palo Alto Research Berkeley, California *Betsy J. Dale Center Keith G. Calkins ArborText Incorporated Michael J. Ferguson Palo Alto, California Andrews University Ann Arbor, Michigan Universit6 du Quebec Verdun, QuBbec, Canada Jennifer B. Bagdigian Berrien Springs, Michigan Laura L. Dale Addison-Wesley Publishing E ArborText Incorporated Anita Flanzbaurn John Carleo Ann Arbor, Michigan Company McGraw-Hill Incorporated MIT Press Journal Reading, Massachusetts New York, New York Jackie Damrau Cambridge, Massachusetts Superconducting Super Neil G. Bartholomew *Lance Carnes Frank Flynn American Mathematical Collider Laboratory Personal QX Incorporated University of British Society Dallas, Texas Mill Valley, California Columbia Providence, Rhode Island Paul Davis Vancouver, British Frederick H. Bartlett Paula E. Carroll Worcester Polytechnic Columbia, Canada Institute Bartlett Press Incorporated Jones and Bartlett Boston, Massachusetts Worcester, Massachusetts Peter Flynn Somerset, New Jersey University College of Cork Donald W. DeLand Charles W. Beardsley Christopher Carruthers Cork, Republic of Ireland Integre Technical Publishing New York, New York University of Ottawa Ottawa, Ontario, Canada Co., Inc. Jim Fox Nelson H. F. Beebe Albuquerque, New Mexico University of Washington Katherine S. Carter University of Utah Dian DeSha Seattle, Washington Salt Lake City, Utah Princeton University Princeton, New Jersey California Institute of Elena Fraboschi Barbara Beeton Technology Indiana University American Mathematical Sheryl D. Chapman Pasadena, California Bloomington, Indiana Society Cogni Seis Development Norman Dobbs Jac A. Fried Providence, Rhode Island Houston, Texas Houghton-Mifflin Company New York University Boston, Massachusetts Diane M. Berezowski Ling Ling Chen New York, New York Carleton University Academia Sinica Andrew E. Dobrowolski Ottawa, Ontario, Canada Taipei, Taiwan, Republic of ArborText Incorporated David R. Fuchs China Ann Arbor, Michigan Palo Alto, California Jerry T. Borges Lawrence Berkeley Ian J. Chin Paula Donovan Harumi Fujiura Laboratory Xenergy, Inc. T@ Users Group ASCII Corporation Berkeley, California Burlington, Massachusetts Providence, Rhode Island Kawasaki, Japan TUGboat, Volume 12 (1991), No. 4-Proceedings or" the 1991 Annual Meeting

Edward A. Gamy Nancy Kruse Hannigan Elizabeth Hyman Jimmie W. Killian University of Illinois at MIT Lincoln Laboratory Brookline, Massachusetts Niantic, Connecticut Chicago Lexington, Massachusetts Patrick Ion Chicago, Illinois Ann Kostant Yannis Haralambous Mathematical Reviews Newton, Massachusetts Bernard Gaulle Villeneuve d'Ascq, France Ann Arbor, Michigan Shoshanna Kostant CIRCEICNRS Donna L. Harmon Calvin W. Jackson Auburndale, Massachusetts Orsay, France American Mathematical California Institute of Christopher A. Gibson Society Technology Brett Kotch ~arcourtBrace Jovanovich Providence, Rhode Island Pasadena Angeles, California Monsey, New York London, England Robert L. Harris Roger B. Jagoda David H. Kratzer Helen M. Gibson Micro Programs Cornell University Los Alamos National Ithaca, New York Wellcome Institute for Incorporated Laboratory Syosset, New York History of Medicine Philip H. Jensen Los Alamos, New Mexico London, England Roger H. Hauck Hypersoft Corporation Smithsonian Astrophysical Cambridge, Massachusetts Albert Kuo Hans Th.J.E. Gieskes Yale University Observatory Peter H. John Elsevier Science Publishers Cambridge, Massachusetts New Haven, Connecticut BV Cranston, Rhode Island *Richard N. Hayes Anna Kurica Amsterdam, Netherlands Gordon C. Johnson ETP Services Co. American Society of Interactive Composition James L. Giles Portland, Oregon Mechanical Engineers Syntax International PTE Corporation New York, New York York, Pennsylvania *Doug Henderson Pleasant Hill, California Blue Sky Research Carl H. Jones Kees van der Laan Regina Girouard Portland, Oregon Groningen, Netherlands American Mathematical Parsippany, New Jersey Amy Hendrickson Society Cheryl A. Jones *Anthony B. Lafrenz rnnology Incorporated Providence, Rhode Island Massachusetts Institute of ETP Services Co. Brookline, Massachusetts Portland, Oregon Richard E. Glass Technology Cambridge, Massachusetts American Institute of Matthew N. Hendryx Brooklyn, New York Mimi Lafrenz Physics *Claire Kahan ETP Services Co. Woodbury, New York Robert H. Hilbert Personal 'I@Incorporated Portland, Oregon John Wiley & Sons Mill Valley, California Christina M. Gorecki Joachim Lammarsch Incorporated Elise Kaiser Aware, Inc. New York, New York Universitat Heidelberg Cambridge, Massachusetts PWS-KENT Publishing Heidelberg, Federal John D. Hobby Company Republic of Germany Roswitha Graham AT&T Bell Laboratories Boston, Massachusetts K.T.H. Royal Institute of F. Murray Hill, New Jersey Takashi Kakiuchi Lauren Landsburg Technology Technique Typsetting Stockholm, Sweden Alan Hoenig Matsushita Electric Ind John Jay College (CUNY) Company Ltd Rochester, New York Geeti Granger New York, New York Osaka, Japan Timothy R. Larson John Wiley & Sons Ltd Behrend College West Sussex, England Anita Z. Hoover Toru Kawate University of Delaware York Graphic Services Erie, Pennsylvania Alfred Gray Newark, Delaware York, Pennsylvania Peggy Lashway University of Maryland Berthold Horn Victoria Keirnan Rensselaer Polytechnic College Park, Maryland MIT Lincoln Laboratory Houghton-Mifflin Company Institute William L. Haberman Lexington, Massachusetts Boston, Massachusetts Troy, New York Rockville, Maryland Blenda Horn *David Kellerman Dan C. Latterner Ian W. Hall Y&Y Northlake Software Mathematical Reviews Oxford University Press Carlisle, Massachusetts Portland, Oregon Ann Arbor, Michigan Oxford, England Cay S. Horstmann Charlene Kellner Charlotte V. Laurendeau San Jose State University Los Alamos National Hope Hamilton T@ Users Group San Jose, California Laboratory National Center for Providence, Rhode Island Los Alamos, New Mexico Atmospheric Research Don Hosek Boulder, Colorado Quixote Digital Typography Niel Kempson John Lavagnino Claremont, California Gloucestershire, England Brandeis University Chris Hamlin Waltham, Massachusetts American Institute of *Roger Hunter John T. Kesich Physics TCI Software Research, Inc. New York University John S. Lee Woodbury, New York Las Cruces, New Mexico New York, New York Los Angeles, California TUGboat, Volume 12 (1991), No. 4

Eve Lehrnann Lothar Meyer-Lerbs Beth Perry Cynthia Rodriguez PWS-KENT Publishing Bremen, Federal Republic of Addison-Wesley Publishing University of Illinois at Company Germany Company Chicago Reading, Massachusetts Chicago, Illinois Boston, Massachusetts Frank Mittellbach John L. Lincoln Electronic Data Systems Noel C. Peterson David E Rogers Pawtucket, Rhode Island Riisselsheim, Federal Library of Congress Annapolis, Maryland Republic of Germany Washington, District of Susan London Columbia Nancy Rogers PWS-KENT Publishing Cornelia M. Monahan Annapolis, Maryland Laurie Petrycki Company American Society of Addison-Wesley Publishing Boston, Massachusetts Mechanical Engineers Shoshana Rosenthal New York, New York Company Srnithsonian Astrophysical Reading, Massachusetts Pierre MacKay Patricia Monohon Observatory University of Washington Cambridge, Massachusetts Santa Barbara, California Teresa Pires Seattle, Washington TI$ Users Group Mark A. Roth Mary Jean Moore Providence, Rhode Island John Mancia University of California Wright-Patterson AFB, Ohio Elsevier Science Publishing Oakland, California Craig R. Platt Bernard Rous Co., Inc. University of Manitoba L. ACM New York, New York Carol Moura Winnipeg, Manitoba, New York, New York American Mathematical Canada John W. Manly Society Chris Rowley Amherst College Providence, Rhode Island Nico AXM. Poppelier Amherst, Massachusetts Elsevier Science Publishers Open University Gillian S. Murray BV London, England Adam Mann Carleton University Amsterdam, Netherlands Long Island City, New York Ottawa, Ontario, Canada Beverly J. Ruedi Gary L. Price Mathematical Association of Jeffrey MeArthur Jane Muse David Systems America Atlis Publishing Services, Houghton-Mifflin Company Sunnyvale, California Washington, D.C. Inc. Boston, Massachusetts Lynne A. Price Beltsville, Maryland Beardsley Rum1 Norman Naugle Frame Technology Legal Support Systems Betty McCarthy Texas A&M University Corporation Incorporated IBM T. J. Watson Research College Station, Texas San Jose, California Cambridge, Massachusetts Center Marion U. Neubauer Martin Rabinowitz Jan Michael Rynning Yorktown Heights, New York Universitat Heidelberg Academic Press Royal Institute of Heidelberg, Federal Sam K. McCollum Incorporated Technology Republic of Germany William Byrd Press, Inc. Cambridge, Massachusetts Stockholm, Sweden Richmond, Virginia Herb Niemirow Stanley Rabinowitz David Salomon Springer-Verlag New York, Mathpro Press Marret McCorkle California State University, Inc. Westford, Massachusetts D.C. Heath New York, New York Northridge Lexington, Massachusetts Jon Radel Northridge, California Pamela B. O'Connor Reston, Virginia Sarah McCracken MIT Lincoln Laboratory Tina Samaha Addison-Wesley Publishing Lexington, Massachusetts Howard Ratner PWS-KENT Publishing Company Springer-Verlag New York, Company Reading, Massachusetts Jose Luis Olivares Inc. Boston, Massachusetts Sociedad Mexicana de Fisica New York, New York Joni H. McDonald Coyoacan, Mexico Ed Sarkel Tom Renfrow Beacon Graphics Jones and Bartlett *Daniel D. Olson Boston, Massachusetts Jet Propulsion Laboratory Corporation ETP Services Co. Pasadena, California Ashland, Ohio Portland, Oregon Robert W. McGaffey Samuel E. Rhoads Martin Marietta Energy Eileen Olszewski Honolulu Community Shashi Sathaye Systems Incorporated Princeton University College University of Kentucky Oak Ridge, Tennessee Princeton, New Jersey Honolulu, Hawaii Lexington, Kentucky Wendy McKay Yoko Ozawa *Guy Rivers Aaron Sawdey University of Montreal NEC Research Institute, Inc. TCI Software Research, Inc. Publication Services Montreal, QuBbec, Canada Princeton, New Jersey Las Cruces, New Mexico Champaign, Illinois Carol A. Meyer Janet I? Pecorelli Pam Rockwell Antoinette T. Schleyer Association for Computing American Mathematical PWS-KENT Publishing American Mathematical Machinery, Inc. Society Company Society New York, New York Providence, Rhode Island Boston, Massachusetts Providence, Rhode Island TUGboat, Volume 12 (1991), No. 4

Fred Schulte C.M. Sperberg-McQueen Craig W. Van Dyck Julie A. Wilczek McGraw-Hill Incorporated University of Illinois at Springer-Verlag New York, American Mathematical New York, New York Chicago Inc. Society Chicago, Illinois New York, New York Providence, Rhode Island Ronald Scott *Michael D. Spivak Irene Vankanan William Willey American Geophysical Digital Equipment McGraw-Hill Incorporated Union wplorators Corporation Houston, Texas Corporation New York, New York Washington, District of Nashua, New Hampshire Columbia Linda Williams David K. Steiner Jifi Veseljr Rutgers University University of Tennessee Luigi Semenzato Charles University Space Institute Piscataway, New Jersey University of California, Prague, Czechoslovakia Tullahoma, Tennessee Berkeley Caroline B. Stewart Berkeley, California *Michael Vulis Cheryl W. Winstead CEBAF Micro Press, Inc. NASA Langley Research Newport News, Virginia John T. Sheridan Forest Hills, New York Center Sheridan Printing Company, Martin Stock Helen Walden Hampton, Virginia Inc. PWS-KENT Publishing Cambridge, Massachusetts David B. Witonsky Alpha, New Jersey Company Philadelphia, Pennsylvania Carol K. Sullivan Boston, Massachusetts Joseph H. Silverman United States Geological Brown University Edward Wang Richard Wong Survey Princeton University Providence, Rhode Island Menlo Park, California University of California, Berkeley Princeton, New Jersey Sally Simpson Pam Suwinsky Berkeley, California Derick Wood Addison-Wesley Publishing Addison-Wesley Publishing University of Waterloo Company Margaret L. Ward Company Waterloo, Ontario, Canada Reading, Massachusetts Massachusetts Institute of Redwood City, California Technology Cambridge, Massachusetts William B. Woolf *Barry Smith Christina Thiele American Mathematical Blue Sky Research Carleton University Leslie C. Watson Society Portland, Oregon Ottawa, Ontario, Canada SFA, Inc. Providence, Rhode Island Temple Hills, Maryland Lowell Smith Lee E Thompson Cheryl Wurzbacher Salt Lake City, Utah University of Wisconsin, Esther K. Weil Addison-Wesley Publishing Madison Albion, Michigan Company *Scobie Smith Madison, Wisconsin A. Reading, Massachusetts Kinch Computer Company Carol Weiss Ithaca, New York Brian E. 'Ik-avis Sun Lakes, Arizona Helen M. Wythe Teleprint Neil A. Weiss Addison-Wesley Publishing Joe Snowdon Englewood, Colorado Arizona State University Company Cambridge, Massachusetts Tempe, Arizona Reading, Massachusetts Velma M. 51er Michael Sofia United States Geological Michael J. Wester Ralph E. Youngen Publication Services Survey Albuquerque, New Mexico American Mathematical Champaign, Illinois Menlo Park, California Alan Wetmore Society Providence, Rhode Island Annie Soltys Frank H. Ulmer White Sands Missle Range, CEBAF Grumman Melbourne New Mexico I-Pen Yuan Newport News, Virginia Systems Division Samuel B. Whidden Taipei, Taiwan, Republic of Melbourne, Florida Cumberland, Rhode Island China Friedhelm Sowa Heinrich Heine University Jeri Uzzo Ron Whitney Eva A. Ziem Diisseldorf, Federal Republic IEEE T)-$ Users Group Texas Instruments of Germany New York, New York Providence, Rhode Island Dallas, Texas