As we said in the previous article, acronyms, acronyms and acronyms are not the same. We said that in an acronym only words full of meaning were taken from the statement. This means that only the main words are taken and the secondary ones (articles, prepositions, etc.) are ignored. For example, in the abbreviation of the United Nations Organization we only take the main words and the acronym is simply UN (United Nations Organization).
However, the abbreviation process of the Sigloids is different. Secondary words are not ruled out in a Sigloid. For example, in the case of ReNFE (Red Española N acional de F errocarriles Españoles) the first and second letters are taken from the first word to make the Sigloid easier to pronounce (for that reason the first 'e' is written in lowercase). The same would happen with CiU (C onvergencia i U nió), in which case the initial of the first word, the initial of the connective article (secondary element) and the initial of the last word are taken. For that reason the 'i' is written in lowercase and not in capital letters, since it is a sigla and not an acronym (in an acronym there are only capital letters). Another example of a century is PyME (Small and Medium - sized Enterprises), an example in which the same thing happens again and everything is capitalized except for the 'y', which is in lowercase since it is not a main word of the sentence.
It may also be that in the abbreviation process one part of one word and another part of another are taken and together they form a new neologism. This is how acronyms are formed, which are words that arise when joining the ends of two words: Spanglish (Spanish-English). The acronym implies in its nature the syllabic pronunciation, which in the acronym is not strictly mandatory –we had already seen that there are consonantal pronunciation acronyms–, a factor that already makes them different.
In short, acronyms are written without periods (although it is not incorrect to put them) and without spaces. Sigloids in uppercase combined with lowercase –depending on the “importance” of the abbreviated word– and acronyms always in lowercase.