CONTENTS: x312xtra x312xtra: Two optional experimental servers for X11R6. x312xtra: x312xtra: Xvfb -- a virtual framebuffer X server. Xvfb is an X server that can x312xtra: run on machines with no display hardware and no physical input x312xtra: devices. It emulates a dumb framebuffer using virtual memory. x312xtra: x312xtra: Xnest -- a nested X server. Xnest is a client of the real server x312xtra: which manages windows and graphics requests on its behalf. Xnest x312xtra: is a server to its own clients. Xnest manages windows and graphics x312xtra: requests on their behalf. x312xtra: