The logo represents a physical object which came with my Soldering_iron ,its purpose was to hold the soldering iron when it was hot.
But recently I noticed that it looked like a GNU and so I made a logo of it.
And because I had no use of the logo,I looked for a project that could use it.So I asked kristianpaul if he knew one and one day he told me that he found this project.
An image of the real object can be found here
The black and white version I made can be found here
The image of the real object and the black and white version are also licensed under the Creative Commons By-SA 3.0 US