this post was submitted on 22 Oct 2026
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We still talk about you because some dumb internal applications that were created more than 2 decades ago and nobody dares to update are still running on them, creating awful cybersecurity weaknesses and dragging the entire network down with it.
Probably 10 years ago I encountered a pump on a job. It was huge. 2-3 stories tall. Probably cost millions.
There was a computer plugged into, an old beige tower case and a CRT monitor with RS232 serial cable between it and the pump.
This was the control system, it was connected to the network (airgapped LAN fortunately).
Was running NT4!
I have no idea why it was set up this way, PLCs were definitely the standard at the time and there were older PLCs than that on the site. No one who worked there was around when it was installed, it was just the way it was.
if it works, why spend the money to change it?