<s>
BlackBox	B-Application
Component	I-Application
Builder	I-Application
is	O
an	O
integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	B-Application
)	O
optimized	O
for	O
component-based	O
software	O
development	O
developed	O
by	O
a	O
small	O
spin-off	O
company	O
,	O
Oberon	B-Language
microsystems	O
AG	O
,	O
of	O
ETH	O
Zurich	O
in	O
Switzerland	O
.	O
</s>
<s>
The	O
IDE	B-Application
consists	O
of	O
development	O
tools	O
,	O
a	O
library	B-Library
of	O
reusable	O
components	O
,	O
a	O
framework	O
that	O
simplifies	O
developing	O
robust	O
custom	O
components	O
and	O
applications	O
,	O
and	O
a	O
run-time	O
environment	O
for	O
components	O
.	O
</s>
<s>
In	O
BlackBox	O
,	O
developing	O
applications	O
and	O
their	O
components	O
is	O
done	O
in	O
the	O
language	O
Component	B-Language
Pascal	I-Language
,	O
a	O
descendant	O
of	O
Pascal	B-Application
,	O
Modula-2	B-Language
,	O
and	O
Oberon	B-Language
.	O
</s>
<s>
Component	B-Language
Pascal	I-Language
is	O
a	O
strongly	O
typed	O
,	O
compiled	O
language	O
that	O
supports	O
modular	O
and	O
object-oriented	B-Language
programming	I-Language
and	O
Eiffel-like	O
pre	O
-	O
and	O
post-condition	O
testing	O
using	O
ASSERT	O
statements	O
.	O
</s>
<s>
It	O
provides	O
full	O
type	O
safety	O
,	O
components	O
(	O
in	O
the	O
form	O
of	O
modules	O
)	O
,	O
dynamic	O
linking	O
of	O
components	O
,	O
and	O
automatic	B-General_Concept
garbage	I-General_Concept
collection	I-General_Concept
to	O
preserve	O
memory	O
integrity	O
.	O
</s>
<s>
The	O
whole	O
BlackBox	O
system	O
is	O
written	O
in	O
Component	B-Language
Pascal	I-Language
and	O
is	O
available	O
as	O
source	O
code	O
:	O
all	O
library	B-Library
components	O
,	O
all	O
development	O
tools	O
,	O
including	O
the	O
Component	B-Language
Pascal	I-Language
compiler	O
,	O
and	O
the	O
low-level	O
runtime	B-Library
system	O
with	O
its	O
garbage	B-General_Concept
collector	I-General_Concept
.	O
</s>
<s>
As	O
its	O
name	O
implies	O
,	O
BlackBox	B-Application
Component	I-Application
Builder	I-Application
supports	O
blackbox	O
abstractions	O
and	O
reuse	O
,	O
in	O
contrast	O
to	O
whitebox	O
,	O
as	O
defined	O
in	O
the	O
book	O
Component	O
Software	O
by	O
Szyperski	O
.	O
</s>
<s>
In	O
1993	O
,	O
it	O
hit	O
the	O
market	O
under	O
the	O
name	O
Oberon/F	O
(	O
for	O
Oberon	B-Language
Framework	O
)	O
and	O
was	O
renamed	O
to	O
BlackBox	B-Application
Component	I-Application
Builder	I-Application
with	O
release	O
1.3	O
end	O
of	O
the	O
1990s	O
.	O
</s>
<s>
According	O
to	O
a	O
posting	O
of	O
Clemens	O
Szyperski	O
on	O
Usenet	B-Application
news	I-Application
Oberon/F	O
and	O
in	O
turn	O
BlackBox	B-Application
Component	I-Application
Builder	I-Application
is	O
a	O
re-implementation	O
of	O
ETHOS	O
,	O
which	O
was	O
completely	O
object-oriented	B-Language
version	O
of	O
the	O
Oberon	B-Application
System	I-Application
,	O
which	O
he	O
had	O
implemented	O
for	O
his	O
PhD	O
thesis	O
.	O
</s>
<s>
As	O
an	O
IDE	B-Application
it	O
is	O
a	O
quite	O
puristic	O
environment	O
without	O
syntax	O
highlighting	O
and	O
code	O
completion	O
.	O
</s>
<s>
Similar	O
to	O
most	O
BASIC	O
dialects	O
and	O
Oberon	B-Language
implementations	O
source	O
code	O
files	O
are	O
binary	O
documents	O
with	O
embeddeed	O
active	O
elements(see below )	O
.	O
</s>
<s>
BlackBox	O
uses	O
a	O
document	O
centered	O
approach	O
(	O
as	O
all	O
versions	O
of	O
the	O
Oberon	B-Application
System	I-Application
)	O
,	O
which	O
is	O
very	O
similar	O
to	O
OpenDoc	B-Application
.	O
</s>
<s>
It	O
features	O
active	O
elements	O
like	O
buttons	O
,	O
embedded	O
documents	O
,	O
folds	O
,	O
drop	O
down	O
lists	O
,	O
and	O
many	O
more	O
in	O
documents	O
and	O
a	O
fascinating	O
way	O
to	O
create	O
user	B-Application
interfaces	I-Application
(	O
UIs	O
)	O
:	O
define	O
the	O
basic	O
UI	O
by	O
exporting	O
interacting	O
variables	O
and	O
procedures	O
from	O
a	O
module	O
,	O
and	O
let	O
the	O
IDE	B-Application
create	O
a	O
draft	O
document	O
representing	O
the	O
UI	O
in	O
a	O
so-called	O
Form	O
,	O
which	O
can	O
be	O
edited	O
in	O
the	O
WYSIWYG	B-Application
editor	I-Application
.	O
</s>
<s>
After	O
Steve	O
Jobs	O
returned	O
to	O
Apple	O
and	O
abandoned	O
OpenDoc	B-Application
,	O
Oberon	B-Language
microsystems	O
ended	O
support	O
for	O
Apple	O
Mac	O
with	O
release	O
1.3.3	O
around	O
2001	O
.	O
</s>
<s>
The	O
Linux	B-Application
version	O
was	O
never	O
released	O
publicly	O
by	O
Oberon	B-Language
microsystems	O
,	O
although	O
OpenBUGS	B-Application
a	O
software	O
package	O
for	O
the	O
Bayesian	O
analysis	O
of	O
complex	O
statistical	O
models	O
using	O
Markov	B-General_Concept
chain	I-General_Concept
Monte	I-General_Concept
Carlo	I-General_Concept
(	O
MCMC	O
)	O
methods	O
based	O
its	O
Linux	B-Application
version	O
on	O
it	O
.	O
</s>
<s>
The	O
group	O
around	O
the	O
website	O
in	O
Russia	O
has	O
published	O
the	O
Linux	B-Application
version	O
,	O
and	O
it	O
is	O
available	O
on	O
their	O
Russian	O
language	O
website	O
and	O
on	O
.	O
</s>
<s>
There	O
are	O
at	O
least	O
four	O
principal	O
versions	O
for	O
MS	O
Windows	O
and	O
at	O
least	O
one	O
for	O
Linux	B-Application
:	O
</s>
<s>
Center	O
version	O
at	O
Component	B-Language
Pascal	I-Language
Collection	O
.	O
</s>
<s>
Core	O
version	O
at	O
Component	B-Language
Pascal	I-Language
Collection	O
.	O
</s>
<s>
BlackBox	O
Oberon	B-Language
for	O
MS	O
Windows	O
,	O
and	O
for	O
Linux	B-Application
by	O
A	O
.	O
Shiryaev	O
,	O
I	O
.	O
Denisov	O
,	O
I	O
.	O
Dehtyarenko	O
,	O
A	O
.	O
Dmitriev	O
.	O
</s>
