<s>
MPE	O
(	O
Multi-Programming	B-Operating_System
Executive	I-Operating_System
)	O
is	O
a	O
discontinued	O
business-oriented	O
mainframe	B-Architecture
computer	I-Architecture
real-time	B-General_Concept
operating	B-General_Concept
system	I-General_Concept
made	O
by	O
Hewlett-Packard	O
.	O
</s>
<s>
While	O
initially	O
a	O
mini-mainframe	O
,	O
the	O
final	O
high-end	O
systems	O
supported	O
12	O
CPUs	B-General_Concept
and	O
over	O
2000	O
simultaneous	O
users	O
.	O
</s>
<s>
It	O
runs	O
on	O
the	O
HP	B-Device
3000	I-Device
family	O
of	O
computers	O
,	O
which	O
originally	O
used	O
HP	O
custom	O
16-bit	B-Device
stack	B-Application
architecture	I-Application
CISC	B-Architecture
CPUs	B-General_Concept
and	O
were	O
later	O
migrated	O
to	O
PA-RISC	B-Device
where	O
the	O
operating	B-General_Concept
system	I-General_Concept
was	O
called	O
MPE	B-Operating_System
XL	I-Operating_System
.	O
</s>
<s>
In	O
1983	O
,	O
the	O
original	O
version	O
of	O
MPE	O
was	O
written	O
in	O
a	O
language	O
called	O
SPL	O
(	O
System	B-Language
Programming	I-Language
Language	I-Language
)	O
.	O
</s>
<s>
MPE	B-Operating_System
XL	I-Operating_System
was	O
written	O
primarily	O
in	O
Pascal	B-Application
,	O
with	O
some	O
assembly	B-Language
language	I-Language
and	O
some	O
of	O
the	O
old	O
SPL	O
code	O
.	O
</s>
<s>
In	O
1992	O
,	O
the	O
OS	O
name	O
was	O
changed	O
to	O
MPE/iX	B-Operating_System
to	O
indicate	O
Unix	B-Application
interoperability	O
with	O
the	O
addition	O
of	O
POSIX	O
compatibility	O
.	O
</s>
<s>
In	O
2002	O
HP	O
released	O
the	O
last	O
version	O
MPE/iX	B-Operating_System
7.5	O
.	O
</s>
<s>
Among	O
others	O
,	O
MPE/iX	B-Operating_System
supports	O
the	O
following	O
list	O
of	O
common	O
commands	B-Application
and	O
programs	O
.	O
</s>
