One impact of the World Wide Web has been to level the playing field to a certain extent for publishing information by putting authoring and displaying tools in the hands of anyone who wants to use them. The University of California at San Diego (UCSD) Science & Engineering Library has taken advantage of the web's instructional possibilities by creating web-based tutorials to provide users with help materials at their own workstations, on-campus or from a remote location. Hypertext Markup Language (HTML) provides an almost ideal vehicle for tutorials on electronic information systems which require the visual impact of system screen examples, can take advantage of the hypertext nature of the web, and can be used remotely. This paper describes techniques for authoring web-based tutorials, including design concerns, adding graphics and tables, and helpful tips, such as testing HTML files on different platforms, screens, and browsers to look for obvious problems with size, color, arrangement, and overall appearance. Instructions for designing slide shows and adding frames are also provided. (Author/SWC)