<s>
Plua	B-Language
is	O
a	O
port	O
of	O
the	O
programming	O
language	O
Lua	B-Language
5.0.3	O
,	O
along	O
with	O
a	O
small	O
IDE	B-Application
,	O
for	O
the	O
Palm	B-Operating_System
Computing	I-Operating_System
platform	I-Operating_System
.	O
</s>
<s>
Lua	B-Language
is	O
a	O
programming	O
language	O
designed	O
at	O
TeCGraf	O
,	O
the	O
Computer	O
Graphics	O
Technology	O
Group	O
of	O
PUC-Rio	O
,	O
Brazil	O
.	O
</s>
<s>
Plua	B-Language
includes	O
some	O
extensions	O
to	O
Lua	B-Language
to	O
better	O
support	O
the	O
Palm	O
platform	O
.	O
</s>
<s>
Development	O
has	O
ceased	O
on	O
Plua	B-Language
,	O
and	O
the	O
latest	O
stable	O
version	O
of	O
Plua	B-Language
2.0	O
can	O
only	O
be	O
downloaded	O
from	O
a	O
discussion	O
board	O
.	O
</s>
<s>
The	O
prior	O
version	O
,	O
Plua	B-Language
1.1	O
,	O
is	O
a	O
port	O
of	O
Lua	B-Language
4.0	O
.	O
</s>
<s>
The	O
new	O
version	O
is	O
thus	O
sometimes	O
called	O
Plua	B-Language
2	O
to	O
avoid	O
confusion	O
.	O
</s>
<s>
Plua	B-Language
has	O
some	O
special	O
functions	O
,	O
or	O
extensions	O
,	O
to	O
support	O
the	O
Palm	O
platform	O
,	O
including	O
:	O
</s>
<s>
Graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
components	O
,	O
defined	O
by	O
position	O
:	O
buttons	O
,	O
checkboxes	O
,	O
etc	O
.	O
</s>
<s>
The	O
compiler	B-Language
and	O
interpreter	B-Application
is	O
approximately	O
150	O
KB	O
,	O
and	O
the	O
compiled	B-Language
helloworldApp.prc	O
shown	O
below	O
is	O
approximately	O
2	O
KB	O
.	O
</s>
<s>
This	O
text	O
will	O
be	O
saved	O
as	O
a	O
normal	O
memo	O
in	O
the	O
Palm	O
,	O
and	O
executed	O
by	O
tapping	O
the	O
"	O
Run	O
"	O
button	O
in	O
the	O
IDE	B-Application
.	O
</s>
<s>
Alternatively	O
,	O
the	O
program	O
can	O
be	O
compiled	B-Language
into	O
a	O
PRC	B-Application
(	O
Palm	B-Operating_System
OS	I-Operating_System
Program	O
File	O
,	O
which	O
is	O
executable	O
on	O
any	O
Palm	O
Platform	O
,	O
provided	O
that	O
the	O
runtime	O
program	O
is	O
present	O
)	O
from	O
the	O
same	O
IDE	B-Application
.	O
</s>
<s>
All	O
Plua	B-Language
memo	O
files	O
must	O
be	O
defined	O
as	O
such	O
before	O
it	O
can	O
be	O
run	O
or	O
compiled	B-Language
in	O
Plua	B-Language
.	O
</s>
<s>
The	O
gui.title	O
function	O
defines	O
the	O
title	O
at	O
the	O
top	O
of	O
the	O
page	O
.	O
</s>
<s>
Parentheses	O
are	O
optional	O
for	O
a	O
Lua	B-Language
function	O
call	O
with	O
a	O
single	O
string	O
argument	O
(	O
and	O
also	O
for	O
a	O
single	O
table	O
constructor	O
)	O
.	O
</s>
<s>
String	B-Language
literals	I-Language
may	O
be	O
either	O
single-quoted	O
or	O
double-quoted	O
.	O
</s>
<s>
The	O
argument	O
ioPending	O
is	O
simply	O
a	O
predefined	O
number	O
included	O
in	O
Plua	B-Language
2	O
representing	O
a	O
request	O
for	O
this	O
behavior	O
.	O
</s>
