The emphasis on truly natural phylogenies spawned the disciplines of cladistics and phylogenetic systematics. During the 1990s archaeologists began to use phylogenetic methods borrowed from cladistics. The techniques and nomenclature of cladistics have been applied to disciplines other than biology. As traditionally defined before the introduction of cladistics, the Perciformes are almost certainly paraphyletic. Such tools are commonly used in comparative genomics, cladistics, and bioinformatics. These groups correspond to the concepts of holophyly, monophyly, paraphyly, and polyphyly used in cladistics. However, these are symplesiomorphies, and more recent classification is based upon cladistics. The study of cultural change is increasingly performed through cladistics and genetic models. The society publishes the journal Cladistics. Cladistics, either generally or in specific applications, has been criticized from its beginnings. While orderly and easy to use, it has come under critique from cladistics. Many of these terms are normally used paraphyletically, outside of cladistics, e.g. as a 'grade'.