PuTTY 0.81
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an XTerm terminal emulator. Putty Portable is also available.
PuTTY is a client program for the SSH, Telnet, and Rlogin network protocols. These protocols are all used to run a remote session on a computer over a network. PuTTY implements the client end of that session: the end at which the session is displayed rather than the end at which it runs.
In really simple terms, you run PuTTY on a Windows machine and tell it to connect to (for example) a Unix machine. PuTTY opens a window. Then, anything you type into that window is sent straight to the Unix machine, and everything the Unix machine sends back is displayed in the window. So you can work on the Unix machine as if you were sitting at its console while sitting somewhere else.
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PuTTY 0.81
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an XTerm terminal emulator. Putty Portable is also available.