<s>
BOOPSI	B-Device
(	O
Basic	O
Object	B-Language
Oriented	I-Language
Programming	I-Language
System	O
for	O
Intuition	B-Application
)	O
is	O
an	O
object-oriented	B-Language
programming	I-Language
system	I-Language
for	O
AmigaOS	B-Application
.	O
</s>
<s>
It	O
extends	O
the	O
AmigaOS	B-Application
windowing	O
environment	O
(	O
Intuition	B-Application
)	O
with	O
an	O
object-oriented	B-Language
subsystem	O
allowing	O
a	O
hierarchy	O
of	O
object	O
classes	O
in	O
which	O
every	O
class	O
defines	O
a	O
single	O
GUI	B-Application
widget	O
or	O
interface	O
event	O
.	O
</s>
<s>
BOOPSI	B-Device
made	O
it	O
easier	O
for	O
developers	O
to	O
create	O
their	O
own	O
system	O
of	O
widgets	O
and	O
create	O
standardized	O
graphical	B-Application
user	I-Application
interfaces	I-Application
.	O
</s>
<s>
Magic	B-Library
User	I-Library
Interface	I-Library
and	O
ReAction	B-Library
are	O
examples	O
of	O
complete	O
widget	B-Library
toolkits	I-Library
built	O
on	O
BOOPSI	B-Device
.	O
</s>
<s>
Both	O
toolkits	O
have	O
become	O
popular	O
with	O
Amiga	O
software	O
programmers	O
to	O
generate	O
and	O
maintain	O
graphical	B-Application
user	I-Application
interfaces	I-Application
.	O
</s>
<s>
The	O
object-oriented	B-Language
design	O
brings	O
advantages	O
such	O
as	O
straightforward	O
coupling	O
of	O
objects	O
with	O
other	O
objects	O
.	O
</s>
<s>
BOOPSI	B-Device
was	O
officially	O
introduced	O
with	O
AmigaOS	B-Application
2.0	O
and	O
was	O
further	O
extended	O
in	O
later	O
releases	O
.	O
</s>
