NetVista is an umbrella name for a variety of products manufactured by IBM.
Meant to provide Internet access to K-12 users, it included such things as a web browser, nanny software and other internet utilities, including a TCP/IP stack.
[1] Starting with version 1.1, the server side was also supported on Windows NT.
It was not sold directly to end-users, but rather as an OEM product to internet providers.
These black case designs were inherited by its successor, the ThinkCentre.