Computer programs are presented to plot item and test characteristic curves and item information functions for parameter estimates produced by the LOGIST and BICAL computer programs. These programs provide data in tabular format, but their usefulness in test development and measurement courses can be greatly enhanced by graphic plots of the item and test curve characteristics. Visual inspection of the curves can facilitate item selection in test development and can improve student learning and retention of item response theory. Four programs are presented with sample curves. (SLD)