This study compared the efficiency (time) and accuracy of two representations of instructional algorithms--list versus flow chart--for the task of using indexes to search for document numbers in the U.S. Documents Monthly Catalog. Participants were 55 undergraduates and 5 adults at the Virginia Military Institute. Two sets (flow charts and lists) of six algorithms were developed and field tested. The algorithms consisted of an average of three decision steps and five action steps; the steps for the list representations used the same directions presented in a numbered list sequence, with decision options referencing different step numbers. Subjects were randomly assigned to treatment group (list and flow chart) and given an instruction sheet and practice exercises on how to use their respective type of algorithm. Each participant was individually timed while working through the algorithms. Both groups completed the questions with 91.7% accuracy; however, the flow chart group (N=9) had a significantly higher number of requests for assistance than did the list representation group. It is suggested that this could be attributable to the novelty of the instructional form. The list group (M=5.24) completed the problems only slightly faster than the flow chart group (M=5.28). It is concluded that, while subjects indicated positive attitudes toward the use of algorithms, the specific form of representation appears to have little effect on the efficiency or accuracy of the search. A list of references, two data tables, and sample instruction sheets are provided. (JB)