An open source USB to GPIB adapter will soon reach version 3, bringing an integrated Ethernet port with PoE support.
XyphroLabs's UsbGpib is an open-source hardware, inexpensive, and portable USB to GPIB adapter aiming to provide "access to ...
In the world of (expensive) lab test equipment the GPIB (general purpose interface bus) connection is hard to avoid if you want any kind of automation, but nobody likes wrangling with the bulky cables ...