Use PC as keyboard w/ Macro Functions

I know this has been asked before, but the response contains dead or outdated links, so the answer isn't readily available anymore.  Here's what I want to do:

1.  Using a PC or laptop, record a series of key presses.
2.  Be able to "play back" these key presses.
3.  The played back keys would be used to control another device.

In other words, I would be using the laptop AS A KEYBOARD.  It would plug into another computer, which would accept these key presses.  

Important: I need to be able to simulate actual hardware key presses.  Software emulation isn't what I'm looking for.  The laptop should be able to plug into any device that accepts keyboard input and receive these recorded keystrokes.

I would guess that some intermediary device would be necessary.

PC key commands over usb --> (some box) --> USB or PS2 output to receiveing PC

Thanks in advance!!
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Vetra Systems make box that accepts serial RS-232 input and sends it out via USB such that it appears as a USB keyboard to the computer connected.  It is a 9 pin serial input so if you don't have a serial port to use you would also need a USB to serial converter to send the keystrokes to the box.

You would need a program to capture and send the keystrokes out the serial port.  This is not a difficult task by any means.

You could probably find other similar devices built for point of sale equipment though much of this is going to have rs-232 serial input as well.

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