Concerning the catalog prefix question I would like to point out some aspects:
- the use of prefixes in the authoritative reference works: The New Grove 2th editions use "K" = Kindermann (for Scarlatti they use "K" = Kirkpatrick), MGG (Musik in Geschichte und Gegenwart) has no reference to Kindermann (probably Riethmüller, how wrote the article, fell rivalry), neither has Brockhaus-Riemann. Harenberg Klaviermusikführer (very popular in Europe) uses "Kind.", The Bielefelder Katalog, one of the largest dicography, use "K".
- the use of "KiV" versus "BV" in the internet are under 5000 matches with Google (looking for "Busoni" plus abbreviation) - not so very much.
- the term "Busoni-Verzeichnis" is somehow a misuse of german language (suggests, Busoni is the author of this Verzeichnis or he is the subject of it - but in fact its about his work; correct would be Busoni-Werke-Verzeichnis, BWV, an already token term).
- historically (see [http://de.wikipedia.org/wiki/Werkverzeichnis] the Verzeichnis usually is named after the author (also BWV starts as "Schmieder-Verzeichnis") as a honour to whom who did the painfully work. Just a few of the large Verzeichnisse are named after the composer. An other aspect is, that there are to many composer joining the B (Bach, Bartok, Beethoven, Bizet, Boccherini, Brahms, Buxtehude, Busoni). On the other hand there are also several Indexer with K (Kindermann (KiV), Kirkpatrick (K), Köchel (KV).
All this is very much confusing. I prefer "KiV" for the reasons:
- often used, especially on CD and writings on Busoni.
- most close to the standard works.
- historical correct and a clear pointer to Kindermann.
It´s just an opinion.