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"I've just found something really interesting (at least for me). Did you ever see 0 Ω resistor? I just found it few days ago and cant figure out what is it's purpose. Can someone maybe tell me what could be it's use? (the instrument is showing around 0,2 Ω but it is resistance from the instrument alone...) If someone does not trust me - he can see the pictures that I just took.

and

Yes, "Zero-ohms" are nothing magical and therefore do have a small resistance. They are used to connect two parts of a pathway on a printed circuit-board, when one pathway for some reason had to be cut in two (e.g. because of another pathway crossing its way). As they are "like" a normal resistor, they can be inserted by the same machines used to insert, cut and solder a normal resistor. You could just as easily used a thin (isolated, if board had paths on both sides) piece of wire to connect the two halves, but then you'd probably have to insert it manually... besides, the zero-ohms looks good.

Koppe

Well, yes, zero ohm resistors can be used as wire bridges in very low-tech printed circuit boards. But, a more common use these days is in the selection of "build options". For example, a manufacturer of LCD modules might offer a variant with an on-board generator for the bias voltage and a variant where the bias voltage must be supplied externally. Rather than buying and stocking different printed circuit boards for these two variants, he will typically use one that can be built two ways. On one, the on-board bias generator parts would be populated. On the other, they would be omitted and the bias line would be connected to an external connection by a zero ohm resistor."--Graham Davies 18:41, 11 September 2007 (UTC)

Source:

http://en.wikipedia.org/wiki/Talk%3AResistor