In Microsoft Windows there is a tool called Remote desktop connection which allows you to connect to another computer and logon to that computer to remote control it. In my work as an system administrator I use remote desktop alot to logon to remote servers in order to administrate them without the need to sit at the physical computer. In large networks there is often a lot of computer to keep track of so what rsrdp does is it lets you create a predefined list of all your servers and from a single program you can easily switch between the different server. It gets alot easier to maintain multiple connections simultaneously.
There are other tools like this for example RoyalTS and Microsoft also has their own tool for this, but the strengths I see with my program is the interface and that it's free. The design I have choosen to go with allows you to get more visible space for your remote connection, there is no toolbars or other unnecessary space eating up the screen size.