Introduction

SEP has been striving to create reproducible research for many years. Our first attempts at reproducible documents began with the introduction of interactive documents Claerbout (1990). We then moved on to putting SEP reports on CDROMs and using ``cake'' Nichols and Cole (1989) so that the results could be recreated using the author's own processing flow. Later we updated to the GNU make system Schwab and Schroeder (1995). Now SEP reports are available online and can be downloaded. Sponsors can see exactly how most of the figures in each paper are created, and those with the type of environment we have at SEP can recreate most of the figures themselves. This paper will explain what we consider reproducible research to be, why we go through the effort of making our research reproducible, how we test reproducibility, and the results of the testing on our last report, SEP-100.