Normally indexes are located at the end of a work. But in this case, in which the need to economize space is at a premium and abbreviations are paramount, we have deemed it germane to include three different indexes for this work; this one, and two others, one of abbreviations for composers and another for record company abbreviations.
None of these indexes refer to a definite page number; instead their purpose is to aid in reading the discographic entries.
This first index contains words and abbreviations that are used broadly in the text of biographical notes at the beginning of the entry for performers and/or in the details for each discographic entry. For example, the initials for musical genre go after the title of a song. It's true, in many cases that information is missing, because it does not appear in the source, the recording itself.
This index contains, jointly and by alphabetical order, the included words and their abbreviation. This is so because the reader needs to freely use both sets of information. If, for example, you find the abbreviation "acn", you will want to know that it corresponds to the word accordion. But, say, if you are a player or great admirer of the instrument, you might want to know which initials to look for to distinguish recordings in which accordions are used. If the initials and the name are one after the other in alphabetical order, as is the case with "acn-acordeón", it will only have one entry. On the other hand, bongos and its initial "bg", which do not immediately follow each other in the alphabetic order, have separate entries.
Words that are not abbreviated, because they are four-letters long, are included anyway so that the reader knows they are not abbreviations, but to make that clear, the word is repeated to ensure it is not an abbreviation. For example, "afro" appears as "afro: afro".