PuTTY (/ˈpʌti/) is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. It can also connect to a serial port (since version 0.59). The name "PuTTY" has no definitive meaning.PuTTY was originally written for Microsoft Windows, but it has been ported to various other operating systems.