This volume constitutes a completion of, rather than a supplement to, the nine volumes of the Encyclopedia of Statistical Sciences; for Vol. 9 (1988), see Zbl 0706.62002, and for the intentions of the whole series see the review of Vol. 1 (1982), Zbl 0552.62001. There are, indeed, a few entries representing repair of serious omissions, for which the Editors must accept responsibility, but the bulk of the material is composed of (a) entries received too late to be included at their proper places in the alphabet and (b) additional cross-references intended to improve the usefulness of the Encyclopedia.