Recursive acronym

I have recently learned about some interesting stuff which I am sharing on by blog.

I have just learned a new term called recursive acronym. A recursive acronym (or occasionally recursive initialism, and sometimes recursive backronym) is an abbreviation that refers to itself in the expression for which it stands. Due to the nature of the English language, which would infinitely recurse left-recursive phrases, recursive abbreviations are circular definitions.

Some technical recursive acronyms are as follows :
GNU — GNU's Not Unix
KDX - KDX Data Transfer (X standing for transfer)
LINE — LINE is Not an Emulator
PHP — PHP: Hypertext Preprocessor (originally "Personal Home Page" tools, officially changed for PHP 3)
PINE — PINE Is Not Elm, originally; PINE now officially stands for "Program for Internet News & E-mail"
PIPS — PIPS Is POSIX on Symbian
PLD — PLD Linux Distribution (originally "Polish(ed) Linux Distribution")
PNG — PNG's Not GIF (graphics format, officially Portable Network Graphics)
RPM — RPM Package Manager (originally "Red Hat Package Manager")
ZINC — ZINC is not commercial, a free database for virtual screening
Zinf — Zinf Is Not FreeA*p
Zombie — Zombie-Oriented Machine-Being Interface Engine
ZINC — ZINC is not commercial, a free database for virtual screening
Zinf — Zinf Is Not FreeA*p
Zombie — Zombie-Oriented Machine-Being Interface Engine

To learn more about it just vist the Wikipedia through the following URL :

http://en.wikipedia.org/wiki/Recursive_acronym