<s>
SuperCard	B-Operating_System
is	O
a	O
high-level	B-Language
development	I-Language
environment	I-Language
that	O
runs	O
on	O
Macintosh	B-Device
computers	I-Device
,	O
under	O
OS	B-Operating_System
8	I-Operating_System
and	O
9	B-Operating_System
,	O
and	O
OS	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
It	O
is	O
inspired	O
by	O
HyperCard	B-Application
,	O
but	O
includes	O
a	O
richer	O
language	O
,	O
a	O
full	O
GUI	B-Application
toolkit	O
,	O
and	O
native	O
color	O
(	O
as	O
opposed	O
to	O
HyperCard	B-Application
's	O
Apple	O
-	O
or	O
third-party-supplied	O
add-ons	O
)	O
.	O
</s>
<s>
The	O
programming	O
language	O
used	O
by	O
SuperCard	B-Operating_System
is	O
called	O
SuperTalk	B-Language
,	O
and	O
is	O
largely	O
based	O
on	O
HyperTalk	B-Language
,	O
the	O
language	O
in	O
HyperCard	B-Application
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
core	O
language	O
,	O
SuperTalk	B-Language
can	O
call	O
out	O
to	O
OSA-based	O
scripting	O
languages	O
such	O
as	O
AppleScript	B-Application
,	O
and	O
shell	B-Operating_System
commands	O
.	O
</s>
<s>
Programs	O
created	O
using	O
SuperCard	B-Operating_System
can	O
be	O
run	O
inside	O
the	O
IDE	O
itself	O
,	O
or	O
as	O
"	O
standalones	O
"	O
,	O
which	O
combine	O
the	O
user-created	O
programs	O
and	O
resources	O
with	O
the	O
execution	O
engine	O
used	O
by	O
SuperCard	B-Operating_System
.	O
</s>
<s>
SuperCard	B-Operating_System
was	O
first	O
created	O
by	O
Bill	O
Appleton	O
and	O
published	O
by	O
Silicon	O
Beach	O
Software	O
in	O
1989	O
.	O
</s>
<s>
Appleton	O
combined	O
elements	O
from	O
World	B-Operating_System
Builder	I-Operating_System
,	O
that	O
he	O
wrote	O
,	O
HyperCard	B-Application
,	O
SuperPaint	B-Application
and	O
the	O
Macintosh	B-Device
user	O
interface	O
.	O
</s>
<s>
Aldus	O
released	O
version	O
1.6	O
of	O
SuperCard	B-Operating_System
which	O
brought	O
support	O
for	O
AppleEvents	O
,	O
enhanced	O
graphic	O
capabilities	O
and	O
several	O
other	O
improvements	O
.	O
</s>
<s>
In	O
February	O
1994	O
,	O
Allegiant	O
Technologies	O
of	O
San	O
Diego	O
bought	O
SuperCard	B-Operating_System
.	O
</s>
<s>
Version	O
1.7	O
of	O
SuperCard	B-Operating_System
,	O
which	O
was	O
released	O
in	O
June	O
1994	O
,	O
included	O
several	O
important	O
enhancements	O
,	O
including	O
QuickTime	B-Application
support	O
and	O
switch	O
statements	O
.	O
</s>
<s>
This	O
was	O
the	O
first	O
PowerPC	B-Architecture
native	O
version	O
,	O
which	O
made	O
it	O
a	O
lot	O
faster	O
than	O
previous	O
versions	O
on	O
newer	O
machines	O
.	O
</s>
<s>
Also	O
,	O
this	O
version	O
introduced	O
an	O
application	O
called	O
Standalone	O
Maker	O
,	O
which	O
put	O
a	O
front	O
end	O
on	O
the	O
ability	O
to	O
edit	O
the	O
resource	O
fork	O
of	O
executable	O
SuperCard	B-Operating_System
projects	O
.	O
</s>
<s>
SuperCard	B-Operating_System
had	O
always	O
been	O
able	O
to	O
produce	O
stand	O
alone	O
executable	O
applications	O
,	O
but	O
this	O
tool	O
lowered	O
the	O
barrier	O
to	O
entry	O
for	O
novice	O
users	O
.	O
</s>
<s>
Version	O
2.5	O
also	O
added	O
full	O
24-bit	O
color	O
,	O
and	O
QuickTime	B-Application
VR	O
support	O
.	O
</s>
<s>
Several	O
versions	O
of	O
SuperCard	B-Operating_System
were	O
released	O
thereafter	O
,	O
that	O
included	O
features	O
such	O
as	O
support	O
for	O
full	O
24-bit	O
color	O
and	O
improvements	O
of	O
the	O
filmstrip	O
feature	O
.	O
</s>
<s>
Twenty	O
months	O
later	O
,	O
the	O
third	O
version	O
of	O
SuperCard	B-Operating_System
was	O
released	O
.	O
</s>
<s>
Allegiant	O
's	O
goal	O
was	O
to	O
keep	O
innovating	O
on	O
the	O
Macintosh	B-Device
product	O
,	O
while	O
delivering	O
a	O
Windows	O
runtime	O
environment	O
(	O
edit	O
on	O
the	O
Mac	B-Device
,	O
run	O
on	O
Windows	O
or	O
Mac	B-Device
)	O
and	O
ultimately	O
a	O
Windows	O
authoring	O
environment	O
.	O
</s>
<s>
The	O
firm	O
went	O
through	O
three	O
different	O
attempts	O
to	O
bring	O
a	O
Windows	O
version	O
of	O
SuperCard	B-Operating_System
to	O
the	O
public	O
.	O
</s>
<s>
The	O
first	O
was	O
a	O
true	O
"	O
port	O
"	O
of	O
the	O
product	O
(	O
which	O
would	O
have	O
included	O
both	O
editing	O
and	O
runtime	O
environments	O
on	O
Windows	O
)	O
,	O
however	O
it	O
was	O
taking	O
too	O
long	O
and	O
was	O
very	O
unstable	O
due	O
to	O
the	O
lack	O
of	O
a	O
robust	O
graphical	O
"	O
toolbox	O
"	O
such	O
as	O
the	O
one	O
offered	O
on	O
the	O
Mac	B-Device
platform	O
.	O
</s>
<s>
It	O
was	O
determined	O
that	O
it	O
would	O
be	O
unfeasible	O
to	O
use	O
the	O
Macintosh	B-Device
source	O
code	O
as	O
a	O
basis	O
for	O
porting	O
to	O
Windows	O
at	O
the	O
time	O
,	O
so	O
a	O
second	O
was	O
an	O
attempt	O
to	O
make	O
a	O
runtime-only	O
environment	O
that	O
supported	O
most	O
of	O
the	O
capabilities	O
of	O
SuperCard	B-Operating_System
,	O
but	O
under	O
a	O
brand	O
new	O
code	O
base	O
that	O
was	O
written	O
from	O
the	O
ground	O
up	O
with	O
new	O
engineers	O
.	O
</s>
<s>
The	O
third	O
attempt	O
was	O
very	O
short-lived	O
,	O
but	O
was	O
based	O
on	O
conversations	O
with	O
Apple	O
related	O
to	O
QuickTime	B-Application
Interactive	O
(	O
QTi	O
)	O
,	O
which	O
was	O
going	O
to	O
provide	O
a	O
Quicktime-based	O
environment	O
that	O
could	O
be	O
used	O
to	O
create	O
a	O
Quicktime-based	O
development	O
and	O
authoring	O
tool	O
using	O
the	O
SuperTalk	B-Language
language	O
.	O
</s>
<s>
Ultimately	O
,	O
the	O
firm	O
also	O
created	O
a	O
SuperCard	B-Operating_System
browser	O
plugin	O
called	O
"	O
Roadster	O
"	O
in	O
1996	O
to	O
run	O
"	O
projects	O
"	O
the	O
SuperCard	B-Operating_System
version	O
of	O
stacks	O
.	O
</s>
<s>
Roadster	O
supported	O
a	O
subset	O
of	O
SuperCard	B-Operating_System
's	O
capabilities	O
,	O
but	O
since	O
it	O
was	O
a	O
web	O
plugin	O
,	O
it	O
was	O
the	O
first	O
time	O
that	O
SuperCard	B-Operating_System
content	O
could	O
be	O
played	O
on	O
Windows	O
.	O
</s>
<s>
In	O
May	O
1998	O
,	O
Incwell	O
DMG	O
acquired	O
SuperCard	B-Operating_System
and	O
all	O
related	O
products	O
from	O
Allegiant	O
.	O
</s>
<s>
This	O
version	O
,	O
which	O
was	O
finally	O
released	O
in	O
October	O
1998	O
,	O
was	O
faster	O
than	O
its	O
predecessors	O
,	O
had	O
support	O
for	O
QuickTime	B-Application
3	O
,	O
Drag	O
and	O
Drop	O
,	O
and	O
more	O
.	O
</s>
<s>
In	O
2002	O
,	O
SuperCard	B-Operating_System
was	O
acquired	O
for	O
the	O
fourth	O
time	O
.	O
</s>
<s>
This	O
time	O
,	O
,	O
the	O
company	O
that	O
had	O
been	O
developing	O
SuperCard	B-Operating_System
for	O
IncWell	O
,	O
bought	O
the	O
product	O
,	O
and	O
announced	O
version	O
4	O
.	O
</s>
<s>
This	O
new	O
version	O
introduced	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
support	O
,	O
complete	O
theme	O
compliance	O
and	O
a	O
wide	O
range	O
of	O
user	O
interface	O
elements	O
to	O
go	O
with	O
it	O
.	O
</s>
<s>
Since	O
then	O
,	O
versions	O
up	O
to	O
4.8	O
have	O
been	O
released	O
,	O
bringing	O
improvements	O
and	O
bug	O
fixes	O
,	O
native	O
support	O
for	O
Apple	O
's	O
new	O
Intel-Chip-Based	O
Macs	B-Device
,	O
IDE	O
enhancements	O
,	O
extended	O
numeric	O
precision	O
,	O
anti-aliased	O
draw	O
graphics	O
,	O
and	O
expanded	O
shell	B-Operating_System
support	O
.	O
</s>
<s>
As	O
of	O
March	O
2023	O
,	O
SuperCard	B-Operating_System
4.8.1	O
is	O
not	O
compatible	O
with	O
macOS	B-Device
Catalina	I-Device
or	O
later	O
due	O
to	O
the	O
removal	O
of	O
32-bit	O
application	O
support	O
in	O
macOS	B-Operating_System
.	O
</s>
