<s>
Record	B-Application
Management	I-Application
Services	I-Application
(	O
RMS	B-Application
)	O
are	O
procedures	O
in	O
the	O
VMS	B-Operating_System
,	O
RSTS/E	B-Operating_System
,	O
RT-11	B-Operating_System
and	O
RSX-11M	B-Application
operating	B-General_Concept
systems	I-General_Concept
that	O
programs	B-Application
may	O
call	O
to	O
process	O
files	B-Operating_System
and	O
records	B-Application
within	O
files	B-Operating_System
.	O
</s>
<s>
Its	O
file	O
formats	O
and	O
procedures	O
are	O
similar	O
to	O
of	O
those	O
in	O
some	O
IBM	O
access	B-Application
methods	I-Application
for	O
several	O
of	O
its	O
mainframe	B-Architecture
computer	I-Architecture
operating	B-General_Concept
systems	I-General_Concept
and	O
by	O
other	O
vendors	O
for	O
file	O
and	O
record	O
management	O
.	O
</s>
<s>
VMS	B-Operating_System
RMS	B-Application
is	O
an	O
integral	O
part	O
of	O
the	O
system	O
software	O
;	O
its	O
procedures	O
run	O
in	O
executive	O
mode	O
.	O
</s>
<s>
(	O
RMS	B-Application
was	O
not	O
initially	O
integrated	O
into	O
RT-11	B-Operating_System
and	O
RSTS/E	B-Operating_System
,	O
but	O
was	O
available	O
as	O
an	O
added	O
charge	O
"	O
layered	O
product	O
"	O
.	O
</s>
<s>
It	O
was	O
later	O
added	O
to	O
RSTS/E	B-Operating_System
and	O
was	O
a	O
part	O
of	O
its	O
standard	O
documentation	O
set	O
.	O
)	O
</s>
<s>
RMS	B-Application
supports	O
four	O
record	O
access	B-Application
methods	I-Application
:	O
</s>
<s>
RMS	B-Application
supports	O
four	O
record	B-Application
formats	I-Application
:	O
</s>
<s>
Digital	O
provided	O
the	O
File	O
Definition	O
Language	O
(	O
FDL	O
)	O
which	O
could	O
be	O
used	O
to	O
define	O
the	O
structure	O
of	O
an	O
RMS	B-Application
file	O
.	O
</s>
