The Invisible Pink Unicorn logo represents atheism.

It is a fusion between the mathematical void symbol and the stylized representation of an unicorn.

The void symbol (empty set Ø) is an allusion to nothingness and in this case meaning "no faith" or "no god".

The unicorn is a reference to a kind of story that atheists often tell to make their point. In this case one of the first stories to circulate the Internet newsgroups: The Invisible Pink Unicorn.  
   
  From Wikipedia, the free encyclopedia. [Search google]
  The Invisible Pink Unicorn (blessed be her holy hooves) is a fictional female deity in the form of a unicorn. The goddess was invented at the usenet discussion group alt.atheism as an alternative to other parody deities like Church of the SubGenius "J.R. Bob Dobbs" or Eris of the Discordianism. Quoting from the alt.atheism FAQ:
Like most Goddesses, she's invisible and highly unlikely to exist. However, there is much argument as to her exact colour, her shape and size, and other properties of her nonexistence. She burns with anger against theists, and allegedly grinds them beneath her holy hooves.

The "believers" famous sayings about faith in the invisible pink unicorn is that, like other religions, it is founded in science and faith. Science - that states that she must be invisible, since we cannot see her. Faith - because we know in our heart that the invisible pink unicorn exists. This is of course a parody of the theological reasoning of other religions.

 

   
  Products with Invisible Pink Unicorn logo.
  As a product, the Invisible Pink Unicorn logo is an informed and subtle symbol for Atheists and Atheism. Its intended for active Atheists or otherwise people in the know, to recognize each other.

Visit the Spreadshirt shop (Best Products!)
Visit the CafePress shop
   
  Visit Ring of Fire to shop for these IPU products:

  Popular IPU items
  IPU Car emblem
  IPU pendants
  IPU pins
   

  Download logos for Atheism: [Right Click to Save]
   
  Invisible Pink Unicorn Logo (License):
   
  - Black (Adobe Illustrator CS2 - zipped)
  - Black (Adobe Photoshop CS2 - 300 dpi)
  - Black (Large - 770x587 - gif)
  - Black (Small - 110x84 - gif)
   
  - White (Adobe Illustrator CS2 - zipped)
  - White (Adobe Photoshop CS2 - 300 dpi)
  - White (Large - 770x587 - gif)
  - White (Small - 110x84 - gif)
 

If you choose to use the ipu logo in a prominent way on your site with a link back to www.invisiblepinkunicorn.com, then write to me on  ta@invisiblepinkunicorn.com and I will list your site below. The more prominent you place the logo, the higher in the list you'll be placed. The highest placed will be those sites that adopt the logo as their own. We're listed on google so this could be a way to improve your hitrates :) Please let me know, if you dont find the logo on the sites listed so that I may remove them from the list.
   
Logospotting:
   
   - Atheistic Forum
   - Ateistisk Forum
   - Wikipedia
   - Religious Tolerance
   - Atheism in Ukraine
   - Irish Atheists
   - Polish Atheist
   - Atheista and  T-Shirt (Buy it!)
   - Invisible Pink Unicorn Web
   - Happy Atheist Forum
   - Shawn Gilbert
   - Druology
   - Life Giving Waters and  Life Giving Waters (Myspace)
   - Atheisthandbook
   - Intellectual Driftwood
   - The Green Belt
   - Life Before Death
   - Chriss Pagani
   - Greatipu.com
   - Atheist Nation
   - Atheist Perspective
   - Atheist Insurgency
   - Nothing is sacred
   - Eclectic Hypnotherapy
   - MumsOnline
   - MiloCast
   - Niewidzialny Rozowy Jednorozec
   - Kowai
   - b0rken
   - The Ocelli Journal
   - Ain't Christian
   - Articles Of Reason
   - The Cure Service Group
   - Irregulartimes
   - Patti The Great
   - Chilly Cheeze
   - Java Supreme
   - Noiseineugene
   - David Pabian
   - The Free Thinkers Match Maker
   - Christian Lies
   - The World Of Dan
   - Political and Atheist Thought
   - The Church of Reality
   - Active Atheism
   - Web Of Reason
   - Emoware
   - Expatstud
   - Ramble on...
   - The Universal Church Triumphant of the Apathetic Agnostic ..
   - SanityCheck
   - Vanity Page
   - Atheists Online
   - Buffalo Atheists
   - Slovak Atheists
   - Palmyra
   - Sometimes Truth Hurts
   - Atheism vs Christianity
   - Cathe Jones
   - Final Transmission
   - GodlessGrief
   - The Path of Reason
   - Deathto.bravehost.com
   - frogproduction.blogspot.com
   - Superstition.blogspot.com
   - New Sophists Alamanc
   - Medina County Astronomical Society
   - Atheism Page
   - Choice Of Logic
   - Ironwolf
   - Nørd.com
   - Ian's website
   - Dimaggio.org
   - PZN
   - In Sanity We Trust
   - Vegnauticpinkunicorn
   - Darkantoliga
   - fredtroll
   - itzallchemical
   - ask7atheist
   - SoapBox
   - Wilson's Almanac
   - A more humane world
   - Forcarl
   - Moontime
   - Freeman
   
   
Music spotting:
   
   - Pink Unicorns (Sound Click)
   - Why does God Kill?(Pink Unicorns Soundtrack)



Tattoo Spotting:
   
   Jason Kevin - Done by Russ @ http://www.truebluecolorado.com/
   
   Kevin - Done at Avalon Tattoo in San Diego
   
   Joe - Done by Kenneth Bryan at Intimate Body Art in Glenside, PA
   
   Jason - Done at falcon studios, Columbus
   
   Judy shows off her IPU tattoo at the Las Vegas Atheists August Meetup
   
   Mike - Done at Planet Ink, Ottawa
   
   Amy - Done at Pitbull Tattoo & Piercing, Asheville, NC.
   Kristian - Done at Tattoo World in Trondheim/Norway.
   Justin - Done at A-1 Tattoo in Franklinville NJ.
   Lauren - Also done at A-1 Tattoo in Franklinville NJ.
   Thomas - Done at Smiling Buddha in Savannah GA
   Merri - Done at Phantom 8 in Denver
   
   
Merchandise spotting:
   
   Greg's car

Art spotting:
   
   Thanks to Carter for his contribution