<s>
A	O
User	B-Application
Interface	I-Application
Management	I-Application
System	I-Application
(	O
UIMS	O
)	O
is	O
a	O
mechanism	O
for	O
cleanly	O
separating	O
process	O
or	O
business	B-Architecture
logic	I-Architecture
from	O
Graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
code	O
in	O
a	O
computer	O
program	O
.	O
</s>
<s>
UIMS	O
are	O
designed	O
to	O
support	O
N-tier	O
architectures	O
by	O
strictly	O
defining	O
and	O
enforcing	O
the	O
boundary	O
between	O
the	O
business	B-Architecture
logic	I-Architecture
and	O
the	O
GUI	B-Application
.	O
</s>
<s>
A	O
fairly	O
rigid	O
Software	B-Architecture
architecture	I-Architecture
is	O
nearly	O
always	O
implied	O
by	O
the	O
UIMS	O
,	O
and	O
most	O
often	O
only	O
one	O
paradigm	O
of	O
separation	O
is	O
supported	O
in	O
a	O
single	O
UIMS	O
.	O
</s>
<s>
A	O
UIMS	O
may	O
also	O
have	O
libraries	O
and	O
systems	O
such	O
as	O
graphical	B-Application
tools	I-Application
for	O
the	O
creation	O
of	O
user	O
interface	O
resources	O
or	O
data	O
stores	O
.	O
</s>
<s>
Essentially	O
,	O
using	O
the	O
grammar	O
of	O
the	O
programming	O
language	O
as	O
the	O
grammar	O
for	O
the	O
GUI	B-Application
.	O
</s>
<s>
A	O
controller	O
layer	O
automatically	O
synchronizes	O
the	O
object	O
with	O
the	O
presentation	O
and	O
vice	O
versa	O
through	O
a	O
two	O
way	O
connection	O
provided	O
by	O
an	O
Observer	B-Language
pattern	I-Language
.	O
</s>
<s>
A	O
commercial	O
program	O
,	O
ViewSoft	O
Internet	O
,	O
was	O
briefly	O
available	O
in	O
the	O
1990s	O
that	O
implemented	O
a	O
general	O
purpose	O
GUI	B-Application
builder	O
based	O
upon	O
the	O
Editing	O
Model	O
.	O
</s>
