<s>
WorldScript	B-Operating_System
is	O
the	O
multilingual	O
text	O
rendering	O
engine	O
for	O
Apple	B-Device
Macintosh	I-Device
's	O
classic	B-Application
Mac	I-Application
OS	I-Application
,	O
before	O
Mac	B-Application
OS	I-Application
X	I-Application
was	O
introduced	O
.	O
</s>
<s>
Starting	O
with	O
version	O
7.1	O
,	O
Apple	O
unified	O
the	O
implementation	O
of	O
non-Roman	O
script	O
systems	O
in	O
a	O
programming	B-Application
interface	I-Application
called	O
WorldScript	B-Operating_System
.	O
</s>
<s>
WorldScript	B-Operating_System
I	O
was	O
used	O
for	O
all	O
one-byte	O
character	O
sets	O
and	O
WorldScript	B-Operating_System
II	O
for	O
two-byte	O
sets	O
.	O
</s>
<s>
Some	O
kits	O
were	O
provided	O
with	O
foreign	O
versions	O
of	O
the	O
system	B-Application
software	I-Application
,	O
and	O
others	O
were	O
sold	O
by	O
Apple	O
and	O
third	O
parties	O
.	O
</s>
<s>
Application	O
support	O
for	O
WorldScript	B-Operating_System
was	O
not	O
universal	O
,	O
since	O
building	O
in	O
support	O
was	O
a	O
significant	O
task	O
.	O
</s>
<s>
In	O
8.5	O
,	O
full	O
Unicode	O
support	O
was	O
added	O
to	O
Mac	B-Application
OS	I-Application
through	O
an	O
API	B-Application
called	O
ATSUI	B-Operating_System
.	O
</s>
<s>
However	O
,	O
WorldScript	B-Operating_System
remained	O
the	O
dominant	O
technology	O
for	O
international	O
text	O
until	O
Mac	B-Application
OS	I-Application
X	I-Application
,	O
because	O
of	O
limited	O
application	O
support	O
for	O
ATSUI	B-Operating_System
.	O
</s>
<s>
Good	O
international	O
support	O
gave	O
a	O
marketing	O
edge	O
to	O
word-processing	O
programs	O
such	O
as	O
Nisus	B-Operating_System
Writer	I-Operating_System
and	O
programs	O
using	O
the	O
WASTE	B-Application
text	I-Application
engine	I-Application
,	O
because	O
Microsoft	B-Application
Word	I-Application
prior	O
to	O
version	O
2001	O
was	O
not	O
WorldScript	B-Operating_System
aware	O
.	O
</s>
<s>
Mark	O
Davis	O
had	O
co-founded	O
the	O
Unicode	O
Consortium	O
,	O
co-authored	O
his	O
first	O
major	O
internationalization	O
framework	O
in	O
the	O
form	O
of	O
WorldScript	B-Operating_System
at	O
Apple	O
,	O
became	O
the	O
internationalization	O
architect	O
at	O
Taligent	B-Operating_System
where	O
he	O
designed	O
what	O
became	O
all	O
the	O
internationalization	O
support	O
for	O
the	O
Java	B-Language
Development	I-Language
Kit	I-Language
1.1	O
,	O
became	O
IBM	O
's	O
Chief	O
Software	O
Globalization	O
Architect	O
,	O
moved	O
to	O
Google	O
to	O
work	O
on	O
internationalization	O
and	O
Unicode	O
,	O
and	O
now	O
helps	O
to	O
choose	O
the	O
emojis	O
for	O
the	O
world	O
's	O
smartphones	O
.	O
</s>
