A formal approach to undo operations in programming languages
ACM Transactions on Programming Languages and Systems (TOPLAS) - The MIT Press scientific computation series
A new conceptual model for interactive user recovery and command reuse facilities
CHI '88 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Concepts and implications of undo for interactive recovery
ACM '85 Proceedings of the 1985 ACM annual conference on The range of computing : mid-80's perspective: mid-80's perspective
Document Formatting Systems: Survey, Concepts, and Issues
ACM Computing Surveys (CSUR)
Optimization criteria for checkpoint placement
Communications of the ACM
An ease of use evaluation of an integrated document processing system
CHI '82 Proceedings of the 1982 Conference on Human Factors in Computing Systems
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Etude is an integrated text editor and formatter that was designed to be easy to learn and easy to use. To measure Etude''s success in meeting these goals, twenty-one computer-naive temporary office workers were taught to use Etude in a controlled experiment. Ninety percent of the subjects were able to create and edit letters after a training period of less than two hours and twenty minutes, though they were not about to perform these tasks as quickly as they could when using a typewriter. Etude did not appear to have any systematic effect on subject anxiety. The subjects had favorable attitudes towards using Etude. These attitudes were at least as favorable as their attitudes towards using a typewriter.