Oxford spelling

Oxford spelling (also "Oxford English Dictionary" spelling, Oxford style, or Oxford English spelling) is a spelling standard that prescribes the use of British spelling in combination with the suffix "-ize" in words like "realize" and "organization", in contrast to use of "-ise" endings.
Oxford spelling is used by many British-based academic/science journals (for example, "Nature") and many international organizations (for example, the United Nations and its agencies). It is common for academic, formal, and technical writing for an international readership (see Usage). In digital documents, Oxford spelling may be indicated by the IETF language tag "en-GB-oxendict" (or historically by "en-GB-oed").
Defining feature.
Oxford spelling uses the suffix "ize" alongside "yse": "organization", "privatize" and "recognizable", rather than "organisation", "privatise" and "recognisable" – alongside "analyse", "paralyse" etc. The Oxford University Press states that the belief that "ize" is an exclusively North American variant is incorrect.
Language tag comparison.
The following table summarizes a few general spelling differences between four major spelling conventions. Note: "en-GB" simply stands for British English; it is not specified whether "-ize" or "-ise" should be used. The language tag <samp>en-GB-oxendict</samp>, however, demands the use of "-ize" and "-ization".