<s>
TellStar	B-Application
was	O
the	O
first	O
graphical	O
astronomy	O
program	O
available	O
for	O
personal	O
computers	O
.	O
</s>
<s>
It	O
was	O
sold	O
from	O
1980-1986	O
by	O
Scharf	O
Software	O
Services	O
,	O
originally	O
for	O
the	O
Apple	B-Device
II	I-Device
then	O
later	O
for	O
IBM	B-Device
PC	I-Device
compatibles	O
.	O
</s>
<s>
TellStar	B-Application
could	O
predict	O
the	O
position	O
of	O
celestial	O
objects	O
on	O
any	O
point	O
of	O
the	O
earth	O
at	O
any	O
time	O
between	O
0	O
and	O
3000AD	O
.	O
</s>
<s>
Clicking	O
on	O
a	O
star	O
with	O
a	O
joystick	B-Device
or	O
gamepad	B-Device
would	O
give	O
detailed	O
information	O
on	O
each	O
object	O
,	O
including	O
declination	O
,	O
right	O
ascension	O
,	O
magnitude	O
,	O
rising	O
and	O
setting	O
times	O
in	O
sidereal	O
time	O
and	O
Universal	O
Time	O
,	O
and	O
ranges	O
of	O
the	O
year	O
of	O
visibility	O
.	O
</s>
