The label printer.

It prints on sticky tape which can be sticked just fine onto computers, monitors, routers, switches, hubs, etc. Whatever has an IP address has also a label.

Until two years ago, we used to use sticky these labels also for cables, wrapping them around and sticking the ling ends back to back. Unfortunately, they tend to fall after two years or so. Bad. So we switched to the label encasings tied with fastening strips. You'll see those on the next pictures again and again.