<s>
System	B-Operating_System
Support	I-Operating_System
Program	I-Operating_System
(	O
SSP	O
)	O
was	O
the	O
operating	B-General_Concept
system	I-General_Concept
of	O
the	O
IBM	B-Device
System/34	I-Device
and	O
System/36	B-Device
minicomputers	B-Architecture
.	O
</s>
<s>
SSP	O
was	O
a	O
command-based	O
operating	B-General_Concept
system	I-General_Concept
released	O
in	O
1977	O
.	O
</s>
<s>
SSP	O
originally	O
contained	O
60	O
or	O
so	O
commands	O
that	O
were	O
implemented	O
on	O
the	O
System/34	B-Device
from	O
1977	O
to	O
1983	O
in	O
different	O
versions	O
called	O
releases	O
.	O
</s>
<s>
SSP	O
originally	O
contained	O
60	O
or	O
so	O
commands	O
that	O
were	O
implemented	O
on	O
the	O
System/34	B-Device
from	O
1977	O
to	O
1983	O
in	O
different	O
versions	O
called	O
releases	O
.	O
</s>
<s>
In	O
1983	O
,	O
IBM	O
repackaged	O
SSP	O
on	O
a	O
new	O
computer	O
called	O
the	O
IBM	B-Device
System/36	I-Device
,	O
which	O
was	O
not	O
object-code	B-General_Concept
compatible	I-General_Concept
with	O
the	O
S/34	O
.	O
</s>
<s>
In	O
1994	O
,	O
IBM	O
repackaged	O
SSP	O
on	O
an	O
updated	O
model	O
of	O
the	O
S/36	B-Device
called	O
the	O
Advanced/36	B-Device
.	O
</s>
<s>
The	O
A/36	O
was	O
an	O
IBM	B-Device
AS/400	I-Device
which	O
had	O
the	O
SSP	O
implemented	O
as	O
a	O
"	O
virtual	B-Architecture
machine	I-Architecture
"	O
.	O
</s>
<s>
S/36	B-Device
Release	O
1.0	O
–	O
this	O
was	O
apparently	O
shipped	O
with	O
the	O
first	O
S/36	B-Device
in	O
1983	O
.	O
</s>
<s>
S/36	B-Device
Release	O
2.0	O
–	O
this	O
release	O
supported	O
the	O
8809-tape	O
drive	O
.	O
</s>
<s>
S/36	B-Device
Release	O
4.0	O
–	O
this	O
was	O
the	O
release	O
where	O
S/36	B-Device
was	O
given	O
5	O
job	O
queues	O
.	O
</s>
<s>
S/36	B-Device
Release	O
5.1	O
–	O
this	O
1988	O
release	O
was	O
the	O
last	O
major	O
change	O
on	O
536X	O
platforms	O
.	O
</s>
<s>
S/36	B-Device
Release	O
6.0	O
–	O
also	O
known	O
as	O
the	O
VASP	O
or	O
Value-Added	O
Support	O
Product	O
,	O
this	O
release	O
added	O
functionality	O
that	O
allowed	O
program	O
calls	O
in	O
RPG	O
,	O
and	O
it	O
also	O
provided	O
software	O
to	O
calculate	O
the	O
size	O
AS/400	B-Device
that	O
the	O
user	O
would	O
need	O
when	O
upgrading	O
.	O
</s>
<s>
Program	O
calls	O
with	O
RPG	O
CALL/PARM	O
were	O
inferior	O
to	O
RPGIII	B-Language
designs	O
and	O
inferior	O
to	O
customer	O
add-on	O
products	O
.	O
</s>
<s>
S/36	B-Device
Release	O
7.1	O
–	O
this	O
1994	O
release	O
was	O
shipped	O
with	O
the	O
Advanced/36	B-Device
(	O
9402-236	O
models	O
)	O
.	O
</s>
<s>
Rumours	O
circulated	O
that	O
stated	O
prior	O
release	O
compilers	O
would	O
not	O
function	O
on	O
the	O
Advanced/36	B-Device
,	O
but	O
they	O
proved	O
unfounded	O
.	O
</s>
<s>
There	O
were	O
reasons	O
a	O
programmer	O
would	O
rather	O
use	O
the	O
5.1	O
RPGII	B-Language
compiler	O
instead	O
of	O
the	O
presumably	O
more	O
advanced	O
7.x	O
compiler	O
.	O
</s>
<s>
S/36	B-Device
Release	O
7.5	O
–	O
this	O
1995	O
release	O
was	O
shipped	O
with	O
the	O
second	O
and	O
final	O
wave	O
of	O
the	O
Advanced/36	B-Device
(	O
9402-436	O
)	O
.	O
</s>
<s>
Functions	O
like	O
WRKSYSVL	O
allowed	O
the	O
operator	O
to	O
change	O
the	O
system	O
time	O
on	O
the	O
fly	O
,	O
which	O
was	O
interesting	O
because	O
customer	O
add-ons	O
to	O
do	O
this	O
through	O
assembler	O
subroutines	O
did	O
not	O
function	O
on	O
the	O
Advanced/36	B-Device
.	O
</s>
<s>
Guest/36	O
–	O
this	O
is	O
Release	O
7.5	O
,	O
but	O
you	O
could	O
set	O
up	O
an	O
M36	O
(	O
a	O
guest	O
)	O
on	O
an	O
AS/400	B-Device
(	O
running	O
OS/400	B-Application
V3R6	O
thru	O
V4R4	O
)	O
,	O
and	O
it	O
would	O
function	O
just	O
like	O
the	O
9402-436	O
,	O
except	O
that	O
in	O
addition	O
to	O
having	O
this	O
guest	O
"	O
partition	O
"	O
,	O
you	O
also	O
had	O
OS/400	B-Application
if	O
you	O
wanted	O
it	O
.	O
</s>
<s>
There	O
were	O
some	O
limitations	O
of	O
number	O
of	O
attached	O
workstations	O
but	O
having	O
two	O
guest/36	O
'	O
s	O
running	O
on	O
an	O
AS/400	B-Device
and	O
setting	O
up	O
DDM	O
(	O
distributed	O
data	O
management	O
)	O
between	O
them	O
and	O
even	O
with	O
OS/400	B-Application
to	O
host	O
large	O
files	O
,	O
could	O
easily	O
be	O
done	O
.	O
</s>
<s>
While	O
the	O
S/36	B-Device
and	O
A/36	O
for	O
the	O
most	O
part	O
worked	O
only	O
with	O
twinax	O
attached	O
terminals	O
,	O
on	O
a	O
Guest/36	O
(	O
or	O
M/36	O
)	O
,	O
you	O
could	O
have	O
all	O
your	O
terminals	O
be	O
on	O
a	O
LAN	O
running	O
tcp/ip	O
and	O
be	O
virtual	O
devices	O
in	O
the	O
Guest/36	O
environment	O
.	O
</s>
<s>
S36EE	O
(	O
S/36	B-Device
execution	O
environment	O
)	O
–	O
this	O
was	O
supported	O
native	O
on	O
the	O
AS/400	B-Device
and	O
its	O
follow	O
on	O
(	O
iSeries	B-Device
,	O
IBM	B-Application
i	I-Application
)	O
,	O
which	O
allows	O
a	O
user	O
to	O
continue	O
to	O
run	O
their	O
s/36	B-Device
programs	O
and	O
procedures	O
without	O
having	O
to	O
convert	O
them	O
.	O
</s>
<s>
The	O
object	O
code	O
however	O
is	O
NOT	O
compatible	O
with	O
the	O
previous	O
S/36	B-Device
and	O
A/36	O
,	O
meaning	O
that	O
one	O
had	O
to	O
recompile	O
all	O
programs	O
and	O
menus	O
.	O
</s>
<s>
However	O
,	O
one	O
advantage	O
is	O
that	O
you	O
can	O
not	O
only	O
run	O
S36EE	O
but	O
also	O
OS/400	B-Application
applications	O
.	O
</s>
<s>
You	O
can	O
access	O
database	O
tables	O
in	O
your	O
S/36	B-Device
programs	O
,	O
you	O
can	O
call	O
RPG/400	O
and	O
RPGIV	O
programs	O
from	O
with	O
a	O
S/36	B-Device
program	O
.	O
</s>
<s>
So	O
,	O
while	O
technically	O
not	O
SSP	O
,	O
it	O
looks	O
like	O
SSP	O
,	O
it	O
acts	O
like	O
SSP	O
,	O
and	O
it	O
will	O
run	O
your	O
S/36	B-Device
programs/procs	O
.	O
</s>
<s>
Limitations	O
on	O
S/36	B-Device
and	O
A/36	O
and	O
M/36	O
operating	B-General_Concept
system	I-General_Concept
:	O
The	O
maximum	O
amount	O
of	O
disk	O
space	O
that	O
a	O
system	O
could	O
utilize	O
was	O
4	O
gb	O
(	O
per	O
occurrence	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
,	O
so	O
a	O
machine	O
running	O
two	O
M36	O
"	O
partitions	O
"	O
could	O
have	O
4	O
gb	O
in	O
each	O
.	O
</s>
<s>
Using	O
SSP	O
,	O
the	O
operator	O
can	O
create	O
,	O
delete	O
,	O
and	O
manage	O
S/34	O
-36	O
objects	O
such	O
as	O
libraries	O
,	O
data	B-General_Concept
files	I-General_Concept
,	O
menus	O
,	O
procedures	O
,	O
source	O
members	O
,	O
and	O
security	O
files	O
.	O
</s>
<s>
SSP	O
contains	O
modules	B-Architecture
such	O
as	O
DFU	O
,	O
SEU	O
,	O
SDA	B-Application
,	O
and	O
WSU	O
that	O
permit	O
operators	O
to	O
build	O
libraries	O
and	O
files	O
,	O
enter	O
information	O
into	O
those	O
files	O
,	O
produce	O
simple	O
reports	O
,	O
and	O
maintain	O
a	O
menu	O
structure	O
that	O
simplifies	O
access	O
to	O
the	O
information	O
.	O
</s>
<s>
The	O
Advanced/36	B-Device
does	O
not	O
support	O
WSU	O
.	O
</s>
<s>
Password	O
and	O
resource	O
security	O
are	O
also	O
implemented	O
through	O
SSP	O
,	O
as	O
are	O
remote	O
communications	O
,	O
which	O
today	O
is	O
similar	O
to	O
dial-up	O
networking	B-Architecture
.	O
</s>
<s>
SSP	O
is	O
a	O
disk-based	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
The	O
complement	O
of	O
a	O
System/34	B-Device
5340	O
,	O
or	O
System/36	B-Device
5360/5362	O
is	O
a	O
fixed	O
disk	O
array	O
of	O
one	O
to	O
four	O
fixed	O
disks	O
,	O
at	O
least	O
one	O
computer	O
terminal	O
,	O
and	O
an	O
8	O
"	O
diskette	O
drive	O
,	O
optionally	O
fitted	O
with	O
two	O
magazine	O
units	O
that	O
can	O
contain	O
10	O
diskettes	O
each	O
and	O
three	O
diskette	O
slots	O
.	O
</s>
<s>
A	O
S/36	B-Device
5363/5364	O
has	O
a	O
5-1/4	O
"	O
diskette	O
drive	O
.	O
</s>
<s>
S/36	B-Device
computers	O
can	O
be	O
configured	O
with	O
an	O
8809	O
reel-to-reel	O
tape	O
drive	O
(	O
800/1600	O
bpi	O
)	O
or	O
a	O
6157	O
1/4	O
"	O
cartridge	O
(	O
QIC	O
)	O
tape	O
drive	O
.	O
</s>
<s>
SDA	B-Application
allows	O
the	O
operator	O
to	O
build	O
screen	O
formats	O
or	O
menus	O
.	O
</s>
<s>
SEU	O
is	O
a	O
text	B-Application
editor	I-Application
which	O
allows	O
data	O
entry	O
on	O
a	O
line-by-line	O
basis	O
.	O
</s>
<s>
Special	O
forms	O
are	O
used	O
to	O
assist	O
the	O
operator	O
in	O
keying	O
RPG	O
programs	O
or	O
other	O
types	O
of	O
form-based	O
languages	O
(	O
WSU	O
,	O
Sort	O
,	O
SDA	B-Application
,	O
etc	O
.	O
)	O
</s>
<s>
High-level	O
language	O
programs	O
require	O
OCL	B-Language
to	O
be	O
activated	O
.	O
</s>
<s>
OCL	B-Language
is	O
used	O
to	O
load	O
programs	O
into	O
the	O
system	O
's	O
memory	O
and	O
start	O
them	O
(	O
a	O
process	O
called	O
execution	O
)	O
and	O
assign	O
resources	O
such	O
as	O
disk	O
files	O
,	O
printers	O
,	O
message	O
members	O
,	O
memory	O
,	O
and	O
disk	O
space	O
to	O
those	O
programs	O
.	O
</s>
<s>
Other	O
abilities	O
,	O
such	O
as	O
displaying	O
text	O
on	O
the	O
screen	O
,	O
pause	O
messages	O
,	O
and	O
so	O
forth	O
,	O
make	O
OCL	B-Language
more	O
powerful	O
.	O
</s>
<s>
RPG	B-Language
II	I-Language
was	O
modified	O
from	O
the	O
System/3	B-Device
days	O
to	O
allow	O
access	O
to	O
the	O
"	O
WORKSTN	O
file	O
"	O
to	O
allow	O
a	O
punched	O
card-based	O
language	O
to	O
interact	O
with	O
a	O
person	O
sitting	O
at	O
a	O
keyboard	O
and	O
monitor	O
.	O
</s>
<s>
Since	O
the	O
user	O
had	O
to	O
display	O
a	O
form	O
on	O
the	O
screen	O
in	O
order	O
to	O
type	O
,	O
RPG	B-Language
II	I-Language
provided	O
a	O
way	O
for	O
a	O
program	O
to	O
write	O
output	O
before	O
accepting	O
input	O
.	O
</s>
<s>
Procedures	O
,	O
which	O
use	O
OCL	B-Language
to	O
start	O
programs	O
and	O
assign	O
resources	O
to	O
them	O
,	O
are	O
type	O
P	O
.	O
</s>
<s>
The	O
Programmer	B-Application
and	I-Application
Operator	I-Application
Productivity	I-Application
Aid	I-Application
(	O
POP	O
)	O
was	O
a	O
widely	O
used	O
development	O
program	O
.	O
</s>
<s>
MAPICS	B-Application
,	O
the	O
Manufacturing	O
and	O
Production	O
Information	O
Control	O
System	O
.	O
</s>
<s>
IBM	B-Application
Office/36	I-Application
collection	O
of	O
programs	O
(	O
DisplayWrite/36	O
,	O
IDDU	O
,	O
Query	O
,	O
and	O
so	O
forth	O
)	O
were	O
popular	O
in	O
the	O
late	O
1980s	O
and	O
were	O
later	O
bundled	O
with	O
the	O
Advanced/36	B-Device
.	O
</s>
<s>
The	O
System/34	B-Device
Text	B-Application
Editor	I-Application
was	O
a	O
precursor	O
to	O
Office/36	B-Application
.	O
</s>
<s>
The	O
Britz	O
Word	O
Processing	O
System	O
was	O
a	O
general-purpose	O
text	B-Application
editor	I-Application
that	O
had	O
mailmerge	O
,	O
label	O
,	O
and	O
basic	O
file	O
editing	O
capabilities	O
.	O
</s>
<s>
A	O
file	O
may	O
be	O
organized	O
with	O
an	O
EXTEND	O
value	O
or	O
it	O
may	O
be	O
allocated	O
with	O
FILE	O
OCL	B-Language
to	O
automatically	O
extend	O
.	O
</s>
<s>
Files	O
on	O
the	O
S/36	B-Device
may	O
be	O
Sequential	O
(	O
S	O
)	O
,	O
Direct	O
(	O
D	O
)	O
,	O
or	O
Indexed	O
(	O
I	O
)	O
.	O
</s>
<s>
An	O
alternate	O
index	O
always	O
has	O
as	O
many	O
records	O
as	O
its	O
parent	O
,	O
as	O
opposed	O
to	O
a	O
System/38	B-Device
-style	O
logical	O
file	O
which	O
is	O
built	O
with	O
conditions	O
to	O
filter	O
records	O
from	O
the	O
parent	O
.	O
</s>
<s>
In	O
1986	O
,	O
support	O
for	O
Distributed	B-Operating_System
Data	I-Operating_System
Management	I-Operating_System
Architecture	I-Operating_System
(	O
DDM	O
)	O
was	O
added	O
to	O
SSP	O
.	O
</s>
<s>
This	O
enabled	O
System/36	B-Device
programs	O
to	O
create	O
,	O
manage	O
,	O
and	O
access	O
record-oriented	O
files	O
on	O
remote	O
System/36	B-Device
,	O
System/38	B-Device
,	O
and	O
IBM	O
mainframe	O
systems	O
running	O
CICS	B-Application
.	O
</s>
<s>
It	O
also	O
enabled	O
programs	O
on	O
remote	O
System/36	B-Device
and	O
System/38	B-Device
computers	O
to	O
create	O
,	O
access	O
,	O
and	O
manage	O
files	O
on	O
a	O
System/36	B-Device
.	O
</s>
<s>
The	O
initial	O
record-oriented	O
file	O
models	O
defined	O
by	O
DDM	O
were	O
based	O
on	O
the	O
System/36	B-Device
file	O
system	O
.	O
</s>
<s>
The	O
System/3	B-Device
(	O
1969	O
)	O
ran	O
a	O
disk-based	O
batch	O
operating	B-General_Concept
system	I-General_Concept
called	O
the	O
System	O
Control	O
Program	O
(	O
SCP	O
)	O
(	O
5702-SC1	O
)	O
.	O
</s>
<s>
IBM	O
later	O
introduced	O
an	O
online	O
program	O
for	O
the	O
System/3	B-Device
named	O
the	O
Communications	O
Control	O
Program	O
(	O
CCP	O
)	O
which	O
was	O
started	O
as	O
a	O
batch	O
program	O
.	O
</s>
<s>
The	O
IBM	B-Device
System/32	I-Device
(	O
1975	O
)	O
ran	O
a	O
disk-based	O
operating	B-General_Concept
system	I-General_Concept
also	O
called	O
the	O
System	O
Control	O
Program	O
.	O
</s>
<s>
The	O
IBM	B-Device
System/38	I-Device
(	O
1978	O
)	O
ran	O
an	O
operating	B-General_Concept
system	I-General_Concept
named	O
the	O
Control	B-Operating_System
Program	I-Operating_System
Facility	I-Operating_System
(	O
CPF	O
)	O
that	O
was	O
much	O
more	O
advanced	O
than	O
SSP	O
and	O
not	O
particularly	O
similar	O
.	O
</s>
