 A popular method of forming words in present-day English takes a multi-word expression such as beginner's all-purpose symbolic instruction code and takes its initial letters to form a pronounceable word with well-formed syllables. The result is referred to as acronym. Here is another example, United Nations Educational Scientific and Cultural Organization. The initial letters of each content word in this expression build the acronym UNESCO, which consists of three well-formed and thus pronounceable present-day English syllables. Note that the formation of acronyms is neither restricted to the initial letters of the items of the underlying expression, nor to its content words as shown, for example, in radar. Here the first two letters from the first term, r, a, and the initial letters from the remaining words are combined and build two well-formed syllables. In summary, the formation of acronyms is relatively flexible. It is a language-specific purely orthographical operation which is permissible as long as the resulting abbreviations are pronounceable and at the same time related to the underlying multi-word expression.