A special issue of the journal Homeopathy, journal of the Faculty of Homeopathy and published by Elsevier, on the 'Memory of Water' brings together scientists from around the world for the first time to publish new data, reviews and discuss recent scientific work exploring the idea that water can display memory effects. The concept of memory of water is important to homeopathy because it offers a potential explanation of the mechanism of action of very high dilutions often used in homeopathy. Guest editor Professor Martin Chaplin of the Department of Applied Science at London South Bank University, remarks: "There is strong evidence concerning many ways in which the mechanism of this 'memory' may come about. There are also mechanisms by which such solutions may possess effects on biological systems which substantially differ from plain water." Citations are important for a journal to get impact factor. Impact factor is a measure reflecting the average number of citations to recent articles published in the journal. The impact of the journal is influenced by impact factor, the journals with high impact factor are considered more important than those with lower ones. This information can be published in our peer reviewed journal with impact factors and are calculated using citations not only from research articles but also review articles (which tend to receive more citations), editorials, letters, meeting abstracts, short communications, and case reports. The concept of the memory of water goes back to 1988 when the late Professor Jacques Benveniste published, in the international scientific journal Nature, claims that extremely high 'ultramolecular' dilutions of an antibody had effects in the human basophil degranulation test, a laboratory model of immune response. In other words, the water diluent 'remembered' the antibody long after it was gone.