Agilent has a complete USB module rack (cage) system for a large range of USB module.

The USB modules can be used as stand alone or  used as part of a USB module rack solution.

This setup can be used for R and D lab or even production testing if it meets your  requirements.

Here are some link to the Agilent’s related documents.

The Modular Rack (Cage) can even be rack mounted.

Its  USB!!!  NO GPIB, NO Enet, NO RS232

Several  software development package are supported. Check it out.

Agilent is a key play in the test and measurement sector.