We continually should work with products or things from which on hands there are traces. There are those who got used to work in gloves, but it seems to much that it is inconvenient. And before them often there is a question how to wash hands from various pollution.

Presently the vast majority of people uses computers. Naturally each of users has programs with which they should work more often than with others, for example, the same Microsoft Word or Excel. Well and, of course, we have computer programs which we use as they are pleasant to us, we spend the leisure-time by means of them – for example, the same Winamp or Windows Media Player.

Virtual memory is a special file on a system disk of the computer which allows the user to use more memory, than is established on the computer and also increases efficiency of use of physical memory several at the same time working programs.

Silver, perhaps, one of the most popular metals of which make jewelry, ware, hours, various objects for a decor, etc. Probably, each owner of a silver product noticed that on it the black raid is formed, and the favourite thing does not look as beautifully any more as earlier, losing the magnificence and gloss. Unfortunately, silver is a metal which can be oxidized, these and can explain the appeared dark raid. It can happen because of the wrong storage, operation, because of reaction to any reagent, human sweat, etc. To return to a favourite product a former look, its owner has to know how to purify silver from blackness and to add it initial gloss.