<s>
Job	O
Entry	O
Subsystem	O
(	O
JES	O
)	O
,	O
aka	O
Job	B-Application
Entry	I-Application
Subsystem	I-Application
1	I-Application
(	O
JES1	B-Application
)	O
,	O
was	O
released	O
by	O
IBM	O
as	O
an	O
integral	O
part	O
of	O
OS/VS1	B-Application
as	O
an	O
enhancement	O
to	O
the	O
basic	O
functions	O
that	O
users	O
of	O
VS1	O
's	O
predecessor	O
,	O
MFT	O
,	O
had	O
.	O
</s>
<s>
IBM	O
proclaimed	O
JES1	B-Application
to	O
be	O
"	O
the	O
single	O
most	O
important	O
addition	O
"	O
to	O
the	O
job	O
scheduling	O
provided	O
by	O
VS1	O
.	O
</s>
<s>
IBM	O
Systems	O
Journal	O
defined	O
JES1	B-Application
's	O
services	O
as	O
Spooling	B-Device
and	O
scheduling	O
,	O
adding	O
"	O
Its	O
three	O
major	O
components	O
are	O
peripheral	O
services	O
,	O
central	O
services	O
,	O
and	O
queue	B-Device
management.	O
"	O
</s>
<s>
JES1	B-Application
was	O
not	O
popular	O
,	O
because	O
HASP	O
and	O
ASP	B-Operating_System
users	O
often	O
had	O
made	O
local	O
modifications	O
(	O
edits	O
)	O
,	O
and	O
wanted	O
to	O
retain	O
their	O
investment	O
.	O
</s>
<s>
JES1	B-Application
permitted	O
operators	O
to	O
submit	O
batch	B-General_Concept
jobs	I-General_Concept
from	O
local	O
unit	O
record	O
equipment	O
.	O
</s>
<s>
The	O
printed	O
and	O
punched	O
output	O
of	O
jobs	O
running	O
on	O
OS/VS1	B-Application
,	O
whether	O
submitted	O
locally	O
or	O
remotely	O
,	O
is	O
handled	O
by	O
JES	O
and	O
may	O
be	O
routed	O
to	O
local	O
devices	O
,	O
to	O
the	O
originating	O
site	O
or	O
to	O
another	O
remote	O
site	O
.	O
</s>
<s>
The	O
Remote	O
Entry	O
Services	O
(	O
RES	O
)	O
of	O
OS/VS1	B-Application
is	O
similar	O
to	O
Remote	O
Job	O
Entry	O
(	O
RJE	O
)	O
on	O
OS/360	O
but	O
the	O
protocol	O
for	O
programmable	O
workstations	O
is	O
that	O
used	O
by	O
HASP	O
II	O
and	O
ASP	B-Operating_System
rather	O
than	O
that	O
used	O
by	O
RJE	O
.	O
</s>
<s>
In	O
MFT	O
a	O
reader	O
or	O
writer	O
task	O
tied	O
up	O
a	O
partition	O
;	O
in	O
JES1	B-Application
a	O
separate	O
partition	O
was	O
required	O
only	O
while	O
starting	O
or	O
stopping	O
the	O
task	O
.	O
</s>
<s>
In	O
MFT	O
each	O
SPOOL	B-Device
file	O
was	O
a	O
separate	O
physical	O
sequential	O
(	O
PS	O
)	O
dataset	O
on	O
public	O
DASD	B-Application
;	O
in	O
JES1	B-Application
SPOOL	B-Device
files	O
are	O
kept	O
in	O
a	O
common	O
SPOOL	B-Device
dataset	O
managed	O
by	O
JES1	B-Application
.	O
</s>
<s>
In	O
MFT	O
a	O
reader	O
task	O
could	O
be	O
delayed	O
by	O
interpreting	O
tasks	O
;	O
in	O
OS/VS1	B-Application
the	O
interpretation	O
is	O
done	O
when	O
the	O
job	O
is	O
initiated	O
.	O
</s>
<s>
The	O
JOB	O
Card	O
JCL	B-Application
was	O
given	O
a	O
new	O
option	O
:	O
TYPRUN	O
=	O
SCAN	O
,	O
whereby	O
a	O
job	O
could	O
be	O
submitted	O
for	O
quick	O
feedback	O
,	O
and	O
-	O
if	O
no	O
errors	O
were	O
detected	O
-	O
be	O
submitted	O
again	O
(	O
without	O
TYPRUN	O
=	O
SCAN	O
on	O
the	O
JOB	O
Card	O
.	O
</s>
<s>
JES1	B-Application
used	O
a	O
SubSystem	O
Interface	O
(	O
SSI	O
)	O
similar	O
to	O
that	O
in	O
MVS	B-Application
.	O
</s>
