Symposium Opening Addresses.- Welcoming Address.- Welcoming Address.- Welcoming Address.- 1. User-System Interfaces: Key Issues.- Softening Up Hard Science: Reply to Newell and Card.- Design and Evaluation of User-System Interfaces or of User-Task Interaction: A Discussion of Interface Design Approach in Different Domains for Application of Modern Information Technology.- Concurrent Computer and Human Information Processing.- On Meaningful Menus for Measurement: Disentangling Evaluative Issues in System Design.- Issues and Red Herrings in Evaluating Natural Language Interfaces.- 2. User-System Interface Analysis.- Criteria and Techniques for the Objective Measurement of Human-Computer Performance.- Human-To-Machine Interaction in Natural Language: Empirical Results of Field Studies with an English and a German Interface.- Applying Operations Research Models to the Study of Complex Man-Machine Interfaces.- 3. User-System Interface Evaluation.- Adaptive User Interfaces for Information Systems: An Evaluation.- DIADES: A Design Tool for Interactive Programs with Provisions to Assess Design Decisions About the Man-Machine Interface.- An Outline of Techniques for Evaluating the Human-Computer Interface.- Software Complexity Assessment and Human-Machine Interface Evaluation.- 4. User-System Interaction.- A Comparison of the Usability of SQL vs a Menu-Driven Interface.- Use of Query Language Boolean Operators by Professionals.- Man-Computer Interaction in Computer-Aided System Analysis and Design: Application of PSL/PSA.- Layout and Highlighting in On-Line Information.- 5. Information System Design and Development.- Performance Measurement and Tuning of Interactive Information Systems.- A Method for Designing Tools for Information Retrieval From Documents.- Implementing Modifications of Information Systems While Using Them: An Intentionally Intervening Approach.- The Semantic Model in Information Retrieval.- 6. Software Engineering.- Counting Leaves - An Evaluation of Ada, LISP, and PROLOG.- Diffusion of Software Engineering Methods.- How do Software Practitioners Write Programs? An Empirical Study.- Empirical Evaluation of a Proposed Model of the Program Design Process.- 7. Software and System Performance Evaluation.- An Evaluation Model for Distributed Computer Systems.- Comparison and Evaluation of Floating Point Representations in IBM/370 and VAX-11/80.- Investigating Downtime and Troubleshooting in Computer-Controlled Production Systems.- Software Pattern Constructs.- 8. Software Transition Tools and Techniques.- A Tool for Transitioning COBOL Programmers to ADA.- Computer Assisted PASCAL to ADA Program Translation.- An Information Systems Software Engineering Methodology.- Configuration Management with the ADA Language System.- 9. Information, Knowledge, and Value.- Expert Systems for Knowledge Engineering: Modes of Development.- What Price the Information Age: A Model for Fair Payment For the Use of Information.- Framework for Evaluating Learning From Computer Programming Courses: Problem Solving in an Introductory Computer Science Course.- 10. Workshops.- Workshop on Research Directions and Opportunities I: Prospects and Open Problems.- Workshop on Research Directions and Opportunities II: Current Funding Program.- Selected Bibliography on Man-Machine Interface Evaluation.- Subject Index to Selected Bibliography.

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