<s>
The	O
Z	B-Language
User	O
Group	O
(	O
ZUG	O
)	O
was	O
established	O
in	O
1992	O
to	O
promote	O
use	O
and	O
development	O
of	O
the	O
Z	B-Language
notation	I-Language
,	O
a	O
formal	B-Application
specification	I-Application
language	O
for	O
the	O
description	O
of	O
and	O
reasoning	O
about	O
computer-based	O
systems	O
.	O
</s>
<s>
It	O
was	O
formally	O
constituted	O
on	O
14	O
December	O
1992	O
during	O
the	O
ZUM'92	O
Z	B-Language
User	O
Meeting	O
in	O
London	O
,	O
England	O
.	O
</s>
<s>
ZUG	O
has	O
organised	O
a	O
series	O
of	O
Z	B-Language
User	O
Meetings	O
approximately	O
every	O
18	O
months	O
initially	O
.	O
</s>
<s>
From	O
2000	O
,	O
these	O
became	O
the	O
ZB	O
Conference	O
(	O
jointly	O
with	O
the	O
B-Method	B-Application
,	O
co-organized	O
with	O
APCB	O
)	O
,	O
and	O
from	O
2008	O
the	O
ABZ	B-Application
Conference	I-Application
(	O
with	O
Abstract	B-Application
State	I-Application
Machines	I-Application
as	O
well	O
)	O
.	O
</s>
<s>
In	O
2010	O
,	O
the	O
ABZ	B-Application
Conference	I-Application
also	O
includes	O
Alloy	B-Application
,	O
a	O
Z-like	O
specification	B-Application
language	O
with	O
associated	O
tool	O
support	O
.	O
</s>
<s>
The	O
Z	B-Language
User	O
Group	O
participated	O
at	O
the	O
FM'99	O
World	O
Congress	O
on	O
Formal	B-Architecture
Methods	I-Architecture
in	O
Toulouse	O
,	O
France	O
,	O
in	O
1999	O
.	O
</s>
<s>
The	O
group	O
and	O
the	O
associated	O
Z	B-Language
notation	I-Language
have	O
been	O
studied	O
as	O
a	O
Community	O
of	O
Practice	O
.	O
</s>
<s>
The	O
following	O
proceedings	O
were	O
produced	O
by	O
the	O
Z	B-Language
User	O
Group	O
:	O
</s>
<s>
Z	B-Language
User	O
Workshop	O
,	O
London	O
1992	O
,	O
Proceedings	O
of	O
the	O
Seventh	O
Annual	O
Z	B-Language
User	O
Meeting	O
,	O
14	O
–	O
15	O
December	O
1992	O
.	O
</s>
<s>
Z	B-Language
User	O
Workshop	O
,	O
Cambridge	O
1994	O
,	O
Proceedings	O
of	O
the	O
Eighth	O
Annual	O
Z	B-Language
User	O
Meeting	O
,	O
29	O
–	O
30	O
June	O
1994	O
.	O
</s>
<s>
ZUM	O
'	O
95	O
:	O
The	O
Z	B-Language
Formal	B-Application
Specification	I-Application
Notation	O
,	O
9th	O
International	O
Conference	O
of	O
Z	B-Language
Users	O
,	O
Limerick	O
,	O
Ireland	O
,	O
September	O
7	O
–	O
9	O
,	O
1995	O
.	O
</s>
<s>
Springer	O
,	O
Lecture	O
Notes	O
in	O
Computer	B-General_Concept
Science	I-General_Concept
,	O
Volume	O
967	O
.	O
</s>
<s>
ZUM	O
'	O
97	O
:	O
The	O
Z	B-Language
Formal	B-Application
Specification	I-Application
Notation	O
,	O
10th	O
International	O
Conference	O
of	O
Z	B-Language
Users	O
,	O
Reading	O
,	O
UK	O
,	O
April	O
3	O
–	O
4	O
,	O
1997	O
.	O
</s>
<s>
Springer	O
,	O
Lecture	O
Notes	O
in	O
Computer	B-General_Concept
Science	I-General_Concept
,	O
Volume	O
1212	O
.	O
</s>
<s>
ZUM	O
'	O
98	O
:	O
The	O
Z	B-Language
Formal	B-Application
Specification	I-Application
Notation	O
,	O
11th	O
International	O
Conference	O
of	O
Z	B-Language
Users	O
,	O
Berlin	O
,	O
Germany	O
,	O
September	O
24	O
–	O
26	O
,	O
1998	O
.	O
</s>
<s>
Springer	O
,	O
Lecture	O
Notes	O
in	O
Computer	B-General_Concept
Science	I-General_Concept
,	O
Volume	O
1493	O
.	O
</s>
<s>
The	O
following	O
ZB	O
conference	O
proceedings	O
were	O
jointly	O
produced	O
with	O
the	O
Association	O
de	O
Pilotage	O
des	O
Conférences	O
B	O
(	O
APCB	O
)	O
,	O
covering	O
the	O
Z	B-Language
notation	I-Language
and	O
the	O
related	O
B-Method	B-Application
:	O
</s>
<s>
ZB	O
2000	O
:	O
Formal	B-Application
Specification	I-Application
and	O
Development	O
in	O
Z	B-Language
and	O
B	O
,	O
First	O
International	O
Conference	O
of	O
B	O
and	O
Z	B-Language
Users	O
,	O
York	O
,	O
UK	O
,	O
August	O
29	O
–	O
September	O
2	O
,	O
2000	O
.	O
</s>
<s>
Springer	O
,	O
Lecture	O
Notes	O
in	O
Computer	B-General_Concept
Science	I-General_Concept
,	O
Volume	O
1878	O
.	O
</s>
<s>
ZB	O
2002	O
:	O
Formal	B-Application
Specification	I-Application
and	O
Development	O
in	O
Z	B-Language
and	O
B	O
:	O
2nd	O
International	O
Conference	O
of	O
B	O
and	O
Z	B-Language
Users	O
Grenoble	O
,	O
France	O
,	O
January	O
23	O
–	O
25	O
,	O
2002	O
.	O
</s>
<s>
Springer	O
,	O
Lecture	O
Notes	O
in	O
Computer	B-General_Concept
Science	I-General_Concept
,	O
Volume	O
2272	O
.	O
</s>
<s>
ZB	O
2003	O
:	O
Formal	B-Application
Specification	I-Application
and	O
Development	O
in	O
Z	B-Language
and	O
B	O
:	O
Third	O
International	O
Conference	O
of	O
B	O
and	O
Z	B-Language
Users	O
,	O
Turku	O
,	O
Finland	O
,	O
June	O
4	O
–	O
6	O
,	O
2003	O
.	O
</s>
<s>
Springer	O
,	O
Lecture	O
Notes	O
in	O
Computer	B-General_Concept
Science	I-General_Concept
,	O
Volume	O
2651	O
.	O
</s>
<s>
ZB	O
2005	O
:	O
Formal	B-Application
Specification	I-Application
and	O
Development	O
in	O
Z	B-Language
and	O
B	O
:	O
4th	O
International	O
Conference	O
of	O
B	O
and	O
Z	B-Language
Users	O
,	O
Guildford	O
,	O
UK	O
,	O
April	O
13	O
–	O
15	O
,	O
2005	O
.	O
</s>
<s>
Springer	O
,	O
Lecture	O
Notes	O
in	O
Computer	B-General_Concept
Science	I-General_Concept
,	O
Volume	O
3455	O
.	O
</s>
<s>
From	O
2008	O
,	O
the	O
ZB	O
conferences	O
were	O
expanded	O
to	O
be	O
the	O
ABZ	B-Application
conference	I-Application
,	O
also	O
including	O
Abstract	B-Application
State	I-Application
Machines	I-Application
.	O
</s>
