<s>
Visual	B-Application
Prolog	I-Application
,	O
previously	O
known	O
as	O
PDC	O
Prolog	B-Language
and	O
Turbo	B-Application
Prolog	I-Application
,	O
is	O
a	O
strongly	O
typed	O
object-oriented	B-Language
extension	O
of	O
Prolog	B-Language
.	O
</s>
<s>
As	O
Turbo	B-Application
Prolog	I-Application
,	O
it	O
was	O
marketed	O
by	O
Borland	O
but	O
it	O
is	O
now	O
developed	O
and	O
marketed	O
by	O
the	O
Danish	O
firm	O
PDC	O
that	O
originally	O
created	O
it	O
.	O
</s>
<s>
Visual	B-Application
Prolog	I-Application
can	O
build	O
Microsoft	B-Application
Windows	I-Application
GUI-applications	O
,	O
console	B-Device
applications	I-Device
,	O
DLLs	O
(	O
dynamic	O
link	O
libraries	O
)	O
,	O
and	O
CGI-programs	O
.	O
</s>
<s>
It	O
can	O
also	O
link	O
to	O
COM	B-Application
components	I-Application
and	O
to	O
databases	O
by	O
means	O
of	O
ODBC	B-Application
.	O
</s>
<s>
Visual	B-Application
Prolog	I-Application
contains	O
a	O
compiler	B-Language
which	O
generates	O
x86	B-Operating_System
machine	O
code	O
.	O
</s>
<s>
Unlike	O
standard	O
Prolog	B-Language
,	O
programs	O
written	O
in	O
Visual	B-Application
Prolog	I-Application
are	O
statically	O
typed	O
.	O
</s>
<s>
This	O
allows	O
some	O
errors	O
to	O
be	O
caught	O
at	O
compile-time	O
instead	O
of	O
run-time	O
.	O
</s>
<s>
Version	O
10	O
introduces	O
object	O
expressions	O
,	O
support	O
for	O
master/slave	O
processes	O
,	O
Microsoft	B-Application
Edge	I-Application
webView2	O
control	O
and	O
some	O
support	O
for	O
Direct2D+DirectWrite+Windows	O
Imaging	O
Component	O
(	O
see	O
also	O
)	O
.	O
</s>
<s>
Version	O
7.4	O
can	O
generate	O
64	O
bit	O
windows	B-Application
code	O
(	O
see	O
also	O
)	O
.	O
</s>
<s>
Version	O
7.3	O
introduced	O
generic	O
classes	O
and	O
interfaces	O
(	O
see	O
Generic	B-Language
programming	I-Language
)	O
,	O
guarded	O
monitors	O
(	O
see	O
also	O
)	O
.	O
</s>
<s>
Version	O
7.2	O
introduced	O
anonymous	O
predicates	O
(	O
a	O
logical	B-Language
pendant	O
to	O
anonymous	B-General_Concept
functions	I-General_Concept
)	O
and	O
namespaces	O
(	O
see	O
also	O
)	O
.	O
</s>
<s>
Since	O
version	O
6.0	O
the	O
language	O
has	O
been	O
fully	O
object-oriented	B-Language
.	O
</s>
<s>
In	O
the	O
Towers	B-Language
of	I-Language
Hanoi	I-Language
example	O
,	O
the	O
Prolog	B-Language
inference	O
engine	O
figures	O
out	O
how	O
to	O
move	O
a	O
stack	O
of	O
any	O
number	O
of	O
progressively	O
smaller	O
disks	O
,	O
one	O
at	O
a	O
time	O
,	O
from	O
the	O
left	O
pole	O
to	O
the	O
right	O
pole	O
in	O
the	O
described	O
way	O
,	O
by	O
means	O
of	O
a	O
center	O
as	O
transit	O
,	O
so	O
that	O
there	O
's	O
never	O
a	O
bigger	O
disk	O
on	O
top	O
of	O
a	O
smaller	O
disk	O
.	O
</s>
<s>
Bruce	O
F	O
.	O
Webster	O
of	O
BYTE	B-Application
praised	O
Turbo	B-Application
Prolog	I-Application
in	O
September	O
1986	O
,	O
stating	O
that	O
it	O
was	O
the	O
first	O
Borland	O
product	O
to	O
excite	O
him	O
as	O
much	O
as	O
Turbo	O
Pascal	O
did	O
.	O
</s>
<s>
He	O
liked	O
the	O
user	O
interface	O
and	O
low	O
price	O
,	O
and	O
reported	O
that	O
two	O
BYU	O
professors	O
stated	O
that	O
it	O
was	O
superior	O
to	O
the	O
Prolog	B-Language
they	O
used	O
at	O
the	O
university	O
.	O
</s>
<s>
While	O
questioning	O
the	O
market	O
demand	O
for	O
the	O
language	O
,	O
Webster	O
concluded	O
that	O
"	O
Turbo	B-Application
Prolog	I-Application
may	O
be	O
as	O
significant	O
a	O
leap	O
in	O
software	O
design	O
as	O
Turbo	O
Pascal	O
represented	O
three	O
years	O
ago	O
"	O
,	O
and	O
recommended	O
it	O
to	O
those	O
"	O
at	O
all	O
interested	O
in	O
artificial	O
intelligence	O
,	O
databases	O
,	O
expert	O
systems	O
,	O
or	O
new	O
ways	O
of	O
thinking	O
about	O
programming	O
"	O
.	O
</s>
<s>
Another	O
author	O
in	O
the	O
magazine	O
that	O
month	O
wrote	O
that	O
the	O
language	O
's	O
nonstandard	O
,	O
more	O
structured	O
syntax	O
as	O
making	O
"	O
source	O
listings	O
much	O
more	O
readable	O
than	O
those	O
of	O
standard	O
Prolog	B-Language
"	O
.	O
</s>
<s>
While	O
stating	O
that	O
it	O
had	O
"	O
many	O
good	O
features	O
"	O
,	O
he	O
stated	O
that	O
Turbo	B-Application
Prolog	I-Application
's	O
"	O
Turbo	O
Pascal	O
flavor	O
in	O
its	O
compiler	B-Language
and	O
strong	O
data	O
typing	O
...	O
create	O
an	O
identity	O
problem	O
for	O
the	O
language	O
"	O
.	O
</s>
<s>
Describing	O
it	O
as	O
"	O
Turbo	O
Paslog	O
"	O
,	O
the	O
author	O
concluded	O
that	O
he	O
does	O
"	O
not	O
recommend	O
it	O
if	O
you	O
are	O
seriously	O
considering	O
becoming	O
a	O
Prolog	B-Language
programmer	O
"	O
.	O
</s>
<s>
The	O
magazine	O
in	O
1989	O
listed	O
Turbo	B-Application
Prolog	I-Application
2.0	O
as	O
among	O
the	O
"	O
Distinction	O
"	O
winners	O
of	O
the	O
BYTE	B-Application
Awards	O
,	O
approving	O
of	O
how	O
Borland	O
had	O
"	O
developed	O
a	O
system	O
for	O
real-world	O
applications	O
programming	O
"	O
.	O
</s>
<s>
Randall	O
Scott	O
,	O
A	O
Guide	O
to	O
Artificial	O
Intelligence	O
with	O
Visual	B-Application
Prolog	I-Application
,	O
</s>
