option.
(1)
A
specification
in
a
statement
that
may
be
used
to
influence
the
execution
of
the
statement.
(2)
A
hardware
or
software
function
that
can
be
selected
or
enabled
as
part
of
a
configuration
process.
(3)
Hardware
(such
as
a
network
adapter)
that
can
be
installed
in
a
device
to
change
or
enhance
device
functions.
P
page.
In
a
virtual
storage
system,
a
fixed-length
block
that
has
a
virtual
address
and
is
transferred
as
a
unit
between
real
storage
and
auxiliary
storage.
(I)
(A)
parallel.
(1)
Pertaining
to
a
process
in
which
all
events
occur
within
the
same
interval
of
time,
each
handled
by
a
separate
but
similar
functional
unit;
for
example,
the
parallel
transmission
of
the
bits
of
a
computer
word
along
the
lines
of
an
internal
bus.
(T)
(2)
Pertaining
to
concurrent
or
simultaneous
operation
of
two
or
more
devices
or
to
concurrent
performance
of
two
or
more
activities
in
a
single
device.
(A)
(3)
Pertaining
to
concurrent
or
simultaneous
occurrence
of
two
or
more
related
activities
in
multiple
devices
or
channels.
(A)
(4)
Pertaining
to
the
simultaneity
of
two
or
more
processes.
(A)
(5)
Pertaining
to
the
simultaneous
processing
of
the
individual
parts
of
a
whole,
such
as
the
bits
of
a
character
and
the
characters
of
a
word,
using
separate
facilities
for
the
various
parts.
(A)
parameter.
(1)
A
variable
that
is
given
a
constant
value
for
a
specified
application
and
that
may
denote
the
application.
(I)
(A)
(2)
An
item
in
a
menu
for
which
the
user
specifies
a
value
or
for
which
the
system
provides
a
value
when
the
menu
is
interpreted.
(3)
Data
passed
between
programs
or
procedures.
partition.
See
logical
partition
.
path.
In
a
network,
any
route
between
any
two
nodes.
(T)
PCI.
Peripheral
component
interconnect.
point-to-point
channel
path
configuration.
In
an
I/O
interface,
a
configuration
that
consists
of
a
single
link
between
a
channel
and
one
control
unit.
Contrast
with
switched
point-to-point
channel
path
configuration
.
point-to-point
topology.
A
network
topology
that
provides
one
communication
path
between
a
channel
and
a
control
unit
and
does
not
include
switching
facilities.
Contrast
with
switched
point-to-point
topology
.
See
also
multidrop
topology
.
POR.
Power-on
reset.
PR/SM.
Processor
Resource/Systems
Manager.
problem
determination.
The
process
of
determining
the
source
of
a
problem;
for
example,
a
program
component,
machine
failure,
telecommunication
facilities,
user
or
contractor-installed
programs
or
equipment,
environmental
failure
such
as
a
power
loss,
or
user
error.
problem
state.
A
condition
during
which
the
processor
cannot
execute
input/output
and
other
privileged
instructions.
Processor
Resource/Systems
Manager
(PR/SM)
feature.
The
feature
that
allows
the
processor
to
use
several
system
control
programs
(SCPs)
simultaneously,
provides
logical
partitioning
capability
for
the
real
machine,
and
provides
support
for
multiple
preferred
guests.
program
status
word
(PSW).
An
area
in
storage
used
to
indicate
the
sequence
in
which
instructions
are
executed,
and
to
hold
and
indicate
the
status
of
the
computer
system.
program
temporary
fix
(PTF).
A
temporary
solution
or
bypass
of
a
problem
diagnosed
by
IBM
as
resulting
from
a
defect
in
a
current,
unaltered
release
of
the
program.
program
version.
A
separate
IBM
licensed
program,
based
on
an
existing
IBM
licensed
program,
that
usually
has
important
new
code
or
functions.
PSW.
Program
status
word.
PTF.
Program
temporary
fix.
R
reconfiguration.
(1)
A
change
made
to
a
given
configuration
in
a
computer
system;
for
example,
isolating
and
bypassing
a
defective
functional
unit
or
connecting
two
functional
units
by
an
alternative
path.
Reconfiguration
is
effected
automatically
or
manually
and
can
be
used
to
maintain
system
integrity.
(T)
(2)
The
process
of
placing
a
processor
unit,
main
storage,
and
channels
offline
for
maintenance,
and
adding
or
removing
components.
recovery.
To
maintain
or
regain
system
operation
after
a
failure
occurs.
Generally,
to
recover
from
a
failure
is
to
identify
the
failed
hardware,
to
deconfigure
the
failed
hardware,
and
to
continue
or
restart
processing.
RMF.
Resource
Measurement
Facility.
S
SCP.
System
control
program.
SCSW.
Subchannel
status
word.
SEC.
System
engineering
change.
Glossary
D-7
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