<s>
NoteCards	B-Application
was	O
a	O
hypertext-based	O
personal	O
knowledge	O
base	O
system	O
developed	O
at	O
Xerox	O
PARC	O
by	O
Randall	O
Trigg	O
,	O
Frank	O
Halasz	O
and	O
Thomas	O
Moran	O
in	O
1984	O
.	O
</s>
<s>
NoteCards	B-Application
was	O
developed	O
after	O
Trigg	O
's	O
pioneering	O
1983	O
Ph.D.	O
thesis	O
on	O
hypertext	O
while	O
at	O
the	O
University	O
of	O
Maryland	O
College	O
Park	O
.	O
</s>
<s>
NoteCards	B-Application
was	O
built	O
on	O
the	O
model	O
four	O
basic	O
kinds	O
of	O
objects	O
:	O
notecards	B-Application
,	O
links	O
,	O
browser	O
card	O
,	O
and	O
a	O
filebox	O
.	O
</s>
<s>
NoteCards	B-Application
was	O
implemented	O
in	O
LISP	B-Language
on	O
D-machine	B-Operating_System
workstations	O
from	O
Xerox	O
which	O
used	O
large	O
,	O
high-resolution	O
displays	B-Device
.	O
</s>
<s>
The	O
NoteCards	B-Application
interface	O
is	O
event-driven	O
.	O
</s>
<s>
One	O
interesting	O
feature	O
of	O
NoteCards	B-Application
is	O
that	O
authors	O
may	O
use	O
LISP	B-Language
commands	O
to	O
customize	O
or	O
create	O
entirely	O
new	O
node	O
types	O
.	O
</s>
<s>
The	O
powerful	O
programming	O
language	O
allows	O
almost	O
complete	O
customization	O
of	O
the	O
entire	O
NoteCards	B-Application
work	O
environment	O
.	O
</s>
<s>
NoteCards	B-Application
was	O
available	O
commercially	O
from	O
the	O
Common	B-Language
Lisp	I-Language
software	O
vendor	O
Venue	O
,	O
compiled	O
for	O
Solaris	B-Application
2.5	I-Application
and	O
7	O
(	O
untested	O
on	O
later	O
versions	O
)	O
and	O
Linux	B-Application
x86	B-Operating_System
with	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
.	O
</s>
