...
Wikis
...
allow
...
people
...
to
...
collaborate
...
on
...
text
...
based
...
documents,
...
share
...
media
...
and
...
documents
...
and
...
comment
...
on
...
each
...
other's
...
work.
...
Once
...
saved
...
a
...
new
...
version
...
is
...
created,
...
so
...
you
...
can
...
always
...
retrieve
...
work
...
if
...
it
...
is
...
modified
...
or
...
deleted.
...
You
...
can
...
also
...
use
...
the
...
revision
...
history
...
to
...
see
...
who
...
has
...
contributed
...
what.
...
The
...
UCL
...
Wiki
...
allows
...
you
...
to
...
add
...
what
...
are
...
known
...
as
...
gadgets
...
to
...
your
...
page
...
to
...
show
...
various
...
information
...
dynamically:
| Gadget | ||||
|---|---|---|---|---|
|
...