<s>
Purdue	B-Library
Enterprise	I-Library
Reference	I-Library
Architecture	I-Library
(	O
PERA	O
)	O
is	O
a	O
1990s	O
reference	O
model	O
for	O
enterprise	O
architecture	O
,	O
developed	O
by	O
Theodore	O
J	O
.	O
Williams	O
and	O
members	O
of	O
the	O
Industry-Purdue	O
University	O
Consortium	O
for	O
Computer	O
Integrated	O
Manufacturing	O
.	O
</s>
<s>
Purdue	B-Library
Enterprise	I-Library
Reference	I-Library
Architecture	I-Library
,	O
</s>
<s>
Batch	O
management	O
;	O
manufacturing	O
execution/operations	O
management	O
systems	O
(	O
MES/MOMS	O
)	O
;	O
laboratory	O
,	O
maintenance	O
and	O
plant	O
performance	O
management	O
systems	O
;	O
data	B-General_Concept
historians	I-General_Concept
and	O
related	O
middleware	O
.	O
</s>
