[SOLVED] What are each of these sockets?

VGA (Analog, RGB display/monitor port)
Parallel port (Centronics 25 pin) IEE 1284.
Serial port 9pin( there was also a 25 pin one which was same as parallel but female), most popular was RS 232, RS 485, RS 422 but there were others.
Both of them had several uses, for printers modems etc.
Below them, proprietary (I believe HP) expansion port. Forerunner of USB and Firewire (IEE 1394)
 
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Jan 10, 2021
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First picture
Custom??? Video port, Parallel port, serial port, serial port
Looks like this was a point of sale terminal or special purpose CPU.
Thank you. Custom video port? Don't you think it's VGA or something? It looks similar to me at least.
Eventually I want to get an adapter so that I can see the computer's output without the CRT monitor that isn't really working.
Perhaps I could get an adapter for the serial port? Note that there's this symbol between the two serial ports: View: https://i.imgur.com/fBZDyvg.png

Doesn't that mean "display"?
 
VGA (Analog, RGB display/monitor port)
Parallel port (Centronics 25 pin) IEE 1284.
Serial port 9pin( there was also a 25 pin one which was same as parallel but female), most popular was RS 232, RS 485, RS 422 but there were others.
Both of them had several uses, for printers modems etc.
Below them, proprietary (I believe HP) expansion port. Forerunner of USB and Firewire (IEE 1394)
 
Reactions: Krotow and kook

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