<s>
In	O
information	O
systems	O
,	O
proactive	B-Application
information	I-Application
delivery	I-Application
(	O
PID	O
)	O
is	O
a	O
paradigm	O
of	O
supporting	O
users	O
in	O
doing	O
their	O
work	O
by	O
delivering	O
them	O
information	O
related	O
to	O
the	O
current	O
working	O
situation	O
.	O
</s>
<s>
Intellext	B-Device
Watson	I-Device
was	O
a	O
prominent	O
tool	O
illustrating	O
the	O
concept	O
of	O
lightweight	O
PID	O
.	O
</s>
