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Is there any good terminal emulator program which will help me save commands so I dont have to type them again and again . It is for communicating with a serial port (COM port) in windows and I have tried putty and serterm but they dont have this functionality. Do you know of any other free software which can achieve what I want?

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the Windows command prompt has a history of commands. Pres F7 to open it:

F7: Shows list of all previous commands from command history

You can press "F7" key to get a list of all previously executed commands and then you can use Up or Down arrow keys to cycle though them. Press Enter to execute the selected command.

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(Image-) Source:

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Save the long, complicated command as a PowerShell script with a short, convenient name.

PowerShell is built into Windows 7. Create the script with Windows PowerShell ISE, or just type the command in a text editor and save the file with a '.ps1' extension. This page may be helpful if you haven't used PowerShell before:

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