edits: the first eight versions of the Wikipedia entry for IBM. The page
has three named authors (listed at left), including a script which changed
some formatting. Each author is given a unique color. Several anonymous
authors also made contributions; their insertions are shown in shades of
gray. The green regions show the contributions of the initial author,
Peter Winnberg, many of which persist throughout the versions shown. Text
that persists over time is darkened to indicate its age, so at the right
side of the diagram Peter Winnberg's contributions have changed from
bright green to dark green.
