Windows operation system:

1. In the search box, type Remote Desktop Connection;
2. In the list of results, click «Remote Desktop Connection»;
3. In the «Computer» box, type «IP address»;
4. Click «Connect» button;
5. Fill up «Login» and «Password» field;
6. Press «OK».

Macintosh (Mac) operation system:

1. Download the Microsoft Remote Desktop client from the Mac App Store;
2. In the Connection Center, click «+» and then click Add PC or Server;
3. Enter the following information «IP address»;
4. «Login» and «Password»;
5. Click «Save»;
6. To start the connection, just double-click it.

Linux operation system:

1. Guys, you really know how it works 😉
2. P.S. Install one of them Vinagre,  krdc, TigerVNC and use it.