We are all used to making calculations on a calculator. It seems quite natural to let an electronic device do this job. But besides simple arithmetical calculations, there are more intellectual tasks. One of them is solving algebraic equations. If you study at university or school, you have to deal with this task quite often. We highly value your abilities and are sure that you can solve any equation. Yourself, but is it worth spending time on it? At the same time, th.

Add tags to your files just like you do with web-pages. While using the computer, we all tend to open the same files over and over. At the work time they are electronic documents; music or video files at the rest-time; and while we communicate to friends, this would be graphical files with photos dear to our hearts. The difference between these important files and documents and other system or service files at our disk space is our frequent need in them.