The name Virtual Network Computer/Computing (VNC) originated with ORL’s work on a thin client called the Videotile, which also used the RFB protocol. The Videotile had an LCD display with pen input
RFB (“remote framebuffer”) is an open simple protocol for remote access to graphical user interfaces. Because it works at the framebuffer level it is applicable to all windowing systems and applications, including Microsoft Windows, macOS and the X Window System.

source wikipedia