<s>
Personal	B-Application
Knowbase	I-Application
is	O
a	O
freeform	O
notes	O
database	O
application	O
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Personal	B-Application
Knowbase	I-Application
was	O
first	O
released	O
in	O
1998	O
on	O
the	O
CompuServe	O
Information	O
Service	O
and	O
is	O
an	O
example	O
of	O
a	O
personal	O
knowledge	O
base	O
.	O
</s>
<s>
This	O
type	O
of	O
keyword-based	O
system	O
was	O
based	O
on	O
the	O
keyword	O
systems	O
used	O
by	O
common	O
research	O
databases	O
of	O
the	O
1990s	O
,	O
such	O
as	O
Knowledge	B-Application
Index	I-Application
and	O
CompuServe	O
's	O
file	O
library	O
,	O
and	O
is	O
similar	O
to	O
the	O
keywords	O
Index	O
for	O
a	O
MS	O
Help	O
file	O
.	O
</s>
<s>
A	O
free	O
read-only	O
version	O
of	O
the	O
program	O
,	O
called	O
Personal	B-Application
Knowbase	I-Application
Reader	O
,	O
is	O
available	O
to	O
allow	O
for	O
distribution	O
of	O
content	O
in	O
the	O
Personal	B-Application
Knowbase	I-Application
format	O
.	O
</s>
<s>
Personal	B-Application
Knowbase	I-Application
is	O
a	O
portable	B-Application
application	I-Application
and	O
can	O
be	O
installed	O
directly	O
onto	O
a	O
USB	O
flash	O
drive	O
.	O
</s>
