<s>
In	O
observational	O
astronomy	O
an	O
On-The-Fly	B-Algorithm
Calibration	I-Algorithm
(	O
OTFC	O
)	O
system	O
calibrates	O
data	O
when	O
a	O
user	O
's	O
request	O
for	O
the	O
data	O
is	O
processed	O
so	O
that	O
users	O
can	O
obtain	O
data	O
that	O
are	O
calibrated	O
with	O
up-to-date	O
calibration	O
files	O
,	O
parameters	O
,	O
and	O
software	O
.	O
</s>
<s>
The	O
OTFC	O
system	O
currently	O
provides	O
data	O
calibration	O
for	O
the	O
Wide	B-Algorithm
Field	I-Algorithm
and	I-Algorithm
Planetary	I-Algorithm
Camera	I-Algorithm
2	I-Algorithm
(	O
WFPC2	B-Algorithm
)	O
and	O
Space	B-Algorithm
Telescope	I-Algorithm
Imaging	I-Algorithm
Spectrograph	I-Algorithm
(	O
STIS	B-Algorithm
)	O
.	O
</s>
<s>
In	O
the	O
future	O
,	O
the	O
Advanced	B-Algorithm
Camera	I-Algorithm
for	I-Algorithm
Surveys	I-Algorithm
(	O
ACS	O
)	O
and	O
possibly	O
the	O
Near	O
Infrared	O
Camera	O
and	O
Multi-Object	O
Spectrometer	O
(	O
NICMOS	O
)	O
will	O
be	O
supported	O
.	O
</s>
