Some frequent examples in our institutional context are campus, curriculum, practicum and thesis, which take the plural forms campuses, curricula, practicums and theses, respectively. Because the standard English plural –s is becoming increasingly widespread, in those cases where you can choose between two alternative plural forms this guide recommends the –s form (for example, prefer syllabuses to syllabi). For a longer list of unusual plural forms, see Appendix III: Unusual plural forms.