useful if the user wishes to have the unknown compared to specific library compounds.(3) A histogram is also presented for each unknown of the number of library compounds which yielded a given value of the disagreement criterion. These compounds satisfy any prefiltering conditions and have been calculated over the requisite mass range. (Compounds which have been rejected because the disagreement criterion exceeded the 10th best member are not included in the histogram.) This feature is particularly useful in determining the distribution of the disagreement criterion beyond the top ten list.