<s>
The	O
Arena	B-Application
browser	I-Application
(	O
also	O
known	O
as	O
the	O
Arena	B-Application
WWW	B-Application
Browser	I-Application
)	O
was	O
one	O
of	O
the	O
first	O
web	B-Application
browsers	I-Application
for	O
Unix	B-Application
.	O
</s>
<s>
Originally	O
begun	O
by	O
Dave	O
Raggett	O
in	O
1993	O
,	O
development	O
continued	O
at	O
CERN	O
and	O
the	O
World	O
Wide	O
Web	O
Consortium	O
(	O
W3C	B-License
)	O
and	O
subsequently	O
by	O
Yggdrasil	O
Computing	O
.	O
</s>
<s>
Arena	B-Application
was	O
used	O
in	O
testing	O
the	O
implementations	O
for	O
HTML	B-Language
version	I-Language
3.0	I-Language
,	O
Cascading	B-Language
Style	I-Language
Sheets	I-Language
(	O
CSS	B-Language
)	O
,	O
Portable	O
Network	O
Graphics	O
(	O
PNG	O
)	O
,	O
and	O
libwww	B-Protocol
.	O
</s>
<s>
Arena	B-Application
was	O
widely	O
used	O
and	O
popular	O
at	O
the	O
beginning	O
of	O
the	O
World	O
Wide	O
Web	O
.	O
</s>
<s>
Arena	B-Application
,	O
which	O
predated	O
Netscape	B-Protocol
Navigator	I-Protocol
and	O
Microsoft	O
's	O
Internet	B-Application
Explorer	I-Application
,	O
featured	O
a	O
number	O
of	O
innovations	O
used	O
later	O
in	O
commercial	O
products	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
browser	B-Application
to	O
support	O
background	O
images	O
,	O
tables	O
,	O
text	O
flow	O
around	O
images	O
,	O
and	O
inline	O
mathematical	O
expressions	O
.	O
</s>
<s>
The	O
Arena	B-Application
browser	I-Application
served	O
as	O
the	O
W3C	B-License
's	O
testbed	O
browser	B-Application
from	O
1994	O
to	O
1996	O
when	O
it	O
was	O
succeeded	O
by	O
the	O
Amaya	B-Language
project	O
.	O
</s>
<s>
In	O
1993	O
,	O
Dave	O
Raggett	O
,	O
then	O
at	O
Hewlett-Packard	O
(	O
HP	O
)	O
in	O
Bristol	O
,	O
England	O
devoted	O
his	O
spare	O
time	O
to	O
developing	O
Arena	B-Application
on	O
which	O
he	O
hoped	O
to	O
demonstrate	O
new	O
and	O
future	O
HTML	B-Language
specifications	O
.	O
</s>
<s>
Development	O
of	O
the	O
browser	B-Application
was	O
slow	O
because	O
Raggett	O
was	O
the	O
lone	O
developer	O
and	O
HP	O
,	O
Raggett	O
demonstrated	O
the	O
browser	B-Application
at	O
the	O
first	O
World	O
Wide	O
Web	O
Conference	O
in	O
Geneva	O
,	O
Switzerland	O
in	O
1994	O
and	O
the	O
1994	O
ISOC	O
conference	O
in	O
Prague	O
to	O
show	O
text	O
flow	O
around	O
images	O
,	O
forms	O
,	O
and	O
other	O
aspects	O
of	O
HTML	B-Language
later	O
termed	O
as	O
the	O
HTML+	B-Language
specification	O
.	O
</s>
<s>
Raggett	O
subsequently	O
partnered	O
with	O
CERN	O
,	O
to	O
develop	O
Arena	B-Application
further	O
as	O
a	O
proof	O
of	O
concept	O
browser	B-Application
for	O
this	O
work	O
.	O
</s>
<s>
Using	O
the	O
Arena	B-Application
browser	I-Application
,	O
Dave	O
Raggett	O
,	O
Henrik	O
Frystyk	O
Nielsen	O
,	O
Håkon	O
Wium	O
Lie	O
and	O
others	O
demonstrated	O
text	O
flow	O
around	O
a	O
figure	O
with	O
captions	O
,	O
resizable	O
tables	O
,	O
image	O
backgrounds	O
,	O
HTML	B-Language
math	O
,	O
and	O
other	O
features	O
.	O
</s>
<s>
At	O
the	O
Web	O
World	O
conference	O
in	O
Orlando	O
,	O
in	O
early	O
1995	O
,	O
Raggett	O
demonstrated	O
the	O
different	O
new	O
features	O
of	O
Arena	B-Application
.	O
</s>
<s>
Since	O
July	O
1994	O
Lie	O
was	O
integrating	O
libwww	B-Protocol
and	O
CSS	B-Language
and	O
helping	O
Raggett	O
.	O
</s>
<s>
In	O
October	O
1995	O
,	O
Yves	O
Lafon	O
joined	O
the	O
team	O
for	O
a	O
year	O
to	O
provide	O
support	O
for	O
HTML	B-General_Concept
form	I-General_Concept
and	O
style	B-Language
sheet	I-Language
development	O
.	O
</s>
<s>
Arena	B-Application
was	O
originally	O
released	O
for	O
Unix	B-Application
,	O
and	O
although	O
there	O
was	O
talk	O
of	O
a	O
Windows	B-Application
and	O
Macintosh	B-Device
port	O
,	O
neither	O
came	O
to	O
fruition	O
.	O
</s>
<s>
Despite	O
its	O
time	O
of	O
development	O
,	O
Arena	B-Application
is	O
in	O
certain	O
areas	O
a	O
relatively	O
modern	O
browser	B-Application
;	O
because	O
it	O
functioned	O
as	O
a	O
testbed	O
,	O
it	O
saw	O
the	O
implementation	O
of	O
new	O
technologies	O
long	O
before	O
they	O
became	O
mainstream	O
,	O
e.g.	O
</s>
<s>
CSS	B-Language
.	O
</s>
<s>
Arena	B-Application
implemented	O
many	O
elements	O
of	O
the	O
HTML3	O
and	O
HTML3.2	O
specification	O
including	O
math	O
elements	O
that	O
were	O
deprecated	O
in	O
HTML4	O
,	O
HTML	B-Language
tables	O
,	O
and	O
experimental	O
style	O
sheets	O
.	O
</s>
<s>
The	O
development	O
history	O
and	O
the	O
source	O
code	O
of	O
earlier	O
software	O
builds	O
are	O
not	O
well	O
documented	O
,	O
because	O
the	O
developers	O
did	O
not	O
want	O
to	O
distribute	O
the	O
source	O
code	O
until	O
they	O
considered	O
the	O
browser	B-Application
to	O
be	O
stable	O
.	O
</s>
<s>
In	O
version	O
0.96	O
,	O
support	O
was	O
added	O
for	O
the	O
FTP	B-Protocol
,	O
NNTP	B-Protocol
,	O
and	O
Gopher	B-Protocol
protocols	I-Protocol
,	O
as	O
well	O
as	O
experimental	O
support	O
for	O
CSS	B-Language
.	O
</s>
<s>
In	O
Arena	B-Application
0.98	O
Dave	O
Beckett	O
added	O
full	O
PNG	O
support	O
.	O
</s>
<s>
The	O
W3C	B-License
published	O
5	O
versions	O
of	O
the	O
Arena	B-Application
beta-1	O
between	O
27	O
November	O
1995	O
and	O
8	O
February	O
1996	O
improving	O
16-bit	B-Device
operating	B-General_Concept
system	I-General_Concept
support	O
and	O
reimplementing	O
CSS	B-Language
(	O
which	O
was	O
still	O
a	O
Working	O
Draft	O
)	O
.	O
</s>
<s>
The	O
W3C	B-License
and	O
the	O
INRIA	O
,	O
a	O
French	O
national	O
research	O
institution	O
,	O
gave	O
additional	O
funding	O
to	O
develop	O
CSS	B-Language
.	O
</s>
<s>
To	O
better	O
implement	O
and	O
write	O
CSS	B-Language
,	O
an	O
experimental	O
style	B-Language
sheet	I-Language
for	O
Arena	B-Application
was	O
developed	O
.	O
</s>
<s>
On	O
22	O
May	O
1996	O
,	O
the	O
W3C	B-License
announced	O
that	O
Amaya	B-Language
will	O
replace	O
Arena	B-Application
as	O
their	O
new	O
testbed	O
and	O
that	O
the	O
W3C	B-License
was	O
looking	O
for	O
a	O
new	O
maintainer	O
because	O
the	O
W3C	B-License
did	O
not	O
have	O
the	O
resources	O
for	O
two	O
testbeds	O
.	O
</s>
<s>
W3C	B-License
Arena	B-Application
:	O
</s>
<s>
W3C	B-License
's	O
:	O
</s>
<s>
Beta-2	O
had	O
two	O
builds	O
(	O
beta-2a	O
:	O
28	O
February	O
1996	O
and	O
beta-2b	O
:	O
21	O
March	O
1996	O
)	O
and	O
introduced	O
a	O
new	O
API	B-Application
for	O
communicating	O
with	O
other	O
applications	O
.	O
</s>
<s>
Also	O
,	O
the	O
internal	O
component	O
libwww	B-Protocol
was	O
updated	O
to	O
version	O
4	O
.	O
</s>
<s>
OMRON	O
Corporation	O
developed	O
an	O
internationalized	B-General_Concept
version	I-General_Concept
that	O
could	O
display	O
Chinese	O
,	O
Korean	O
and	O
Japanese	O
characters	O
in	O
one	O
page	O
.	O
</s>
<s>
OMRON	O
's	O
Arena	B-Application
supports	O
both	O
ISO-2022	O
and	O
Unicode	O
.	O
</s>
<s>
It	O
is	O
able	O
to	O
guess	O
the	O
charset	B-General_Concept
parameter	O
automatically	O
if	O
charset	B-General_Concept
parameter	O
is	O
n't	O
specified	O
in	O
Content-Type	O
field	O
.	O
</s>
<s>
Beta-3a	O
released	O
on	O
14	O
August	O
1996	O
and	O
Beta-3b	O
released	O
on	O
16	O
September	O
1996	O
introduced	O
support	O
for	O
the	O
Linux	B-Application
operating	I-Application
systems	I-Application
on	O
m68k	B-Device
and	O
DEC	B-Device
Alpha	I-Device
.	O
</s>
<s>
CSS	B-Language
1	O
support	O
was	O
enhanced	O
and	O
the	O
internationalized	B-General_Concept
version	I-General_Concept
was	O
also	O
updated	O
.	O
</s>
<s>
Between	O
the	O
two	O
beta-3	O
releases	O
the	O
W3C	B-License
was	O
already	O
looking	O
at	O
a	O
new	O
testbed	O
and	O
switched	O
later	O
to	O
the	O
Amaya	B-Language
browser	I-Language
.	O
</s>
<s>
Beta-3	O
was	O
the	O
last	O
involvement	O
of	O
the	O
W3C	B-License
in	O
the	O
development	O
of	O
Arena	B-Application
.	O
</s>
<s>
On	O
17	O
February	O
1997	O
,	O
Yggdrasil	O
Computing	O
took	O
over	O
the	O
role	O
of	O
developing	O
the	O
browser	B-Application
.	O
</s>
<s>
On	O
17	O
February	O
1997	O
,	O
the	O
W3C	B-License
approved	O
Yggdrasil	O
to	O
coordinate	O
future	O
development	O
of	O
Arena	B-Application
.	O
</s>
<s>
Development	O
was	O
taken	O
over	O
by	O
Yggdrasil	O
,	O
with	O
the	O
idea	O
to	O
turn	O
Arena	B-Application
into	O
an	O
open	O
source	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
browser	B-Application
licensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
Yggdrasil	O
licensed	O
an	O
X	B-Operating_System
emulator	B-Application
from	O
Pearl	O
Software	O
to	O
port	O
Arena	B-Application
to	O
Windows	B-Application
,	O
although	O
these	O
builds	O
were	O
never	O
released	O
.	O
</s>
<s>
Yggdrasil	O
did	O
not	O
provide	O
any	O
official	O
binaries	O
at	O
this	O
time	O
,	O
because	O
they	O
did	O
not	O
want	O
to	O
expand	O
the	O
community	O
with	O
alpha-quality	O
software	O
.	O
</s>
<s>
Although	O
users	O
would	O
be	O
able	O
to	O
run	O
Arena	B-Application
by	O
compiling	B-Language
it	O
from	O
the	O
published	O
source	O
code	O
,	O
volunteers	O
created	O
unofficial	O
finished	O
binaries	O
.	O
</s>
<s>
Yggdrasil	O
had	O
planned	O
to	O
implement	O
browsing	O
features	O
that	O
were	O
already	O
standard	O
in	O
competitive	O
web	B-Application
browsers	I-Application
,	O
which	O
resulted	O
in	O
the	O
new	O
bookmarks	O
feature	O
in	O
version	O
0.3.18	O
on	O
7	O
April	O
1997	O
.	O
</s>
<s>
The	O
W3C	B-License
did	O
not	O
consider	O
demonstration	O
projects	O
to	O
be	O
high	O
priority	O
,	O
and	O
thus	O
,	O
the	O
Arena	B-Application
browser	I-Application
was	O
entirely	O
shut	O
down	O
in	O
favor	O
of	O
outside	O
Linux-community	O
development	O
.	O
</s>
<s>
Arena	B-Application
supported	O
the	O
following	O
features	O
:	O
</s>
<s>
style	B-Language
sheet	I-Language
editing	O
.	O
</s>
<s>
Arena	B-Application
was	O
built	O
using	O
the	O
multi-threaded	O
library	B-Library
of	O
common	O
code	O
called	O
the	O
W3C	B-License
Reference	O
Library	B-Library
,	O
now	O
called	O
libwww	B-Protocol
.	O
</s>
<s>
Originally	O
,	O
the	O
Arena	B-Application
browser	I-Application
was	O
built	O
on	O
top	O
of	O
Xlib	B-Language
as	O
Raggett	O
considered	O
the	O
programming	O
manuals	O
for	O
Motif	B-Application
and	O
other	O
X	B-Language
libraries	I-Language
to	O
be	O
rather	O
daunting	O
.	O
</s>
<s>
Arena	B-Application
has	O
three	O
different	O
systems	O
for	O
the	O
version	O
numbering	O
.	O
</s>
<s>
The	O
W3C	B-License
pre-beta	O
phase	O
uses	O
a	O
system	O
of	O
numbers	O
up	O
to	O
0.99	O
,	O
which	O
indicated	O
that	O
these	O
builds	O
were	O
in	O
alpha-quality	O
and	O
the	O
browser	B-Application
could	O
have	O
new	O
features	O
.	O
</s>
<s>
After	O
Yggdrasil	O
overtook	O
the	O
development	O
,	O
the	O
development	O
status	O
was	O
changed	O
from	O
the	O
W3C	B-License
beta	O
builds	O
back	O
to	O
alpha	B-Device
,	O
implying	O
that	O
the	O
Arena	B-Application
browser	I-Application
was	O
n't	O
yet	O
ready	O
for	O
release	O
.	O
</s>
<s>
The	O
beta-3e	O
version	O
numbering	O
then	O
became	O
0.3.5	O
in	O
GNU	B-Operating_System
style	O
Development	O
remained	O
in	O
alpha	B-Device
stage	O
until	O
0.3.62	O
,	O
and	O
never	O
again	O
advanced	O
to	O
beta	O
.	O
</s>
<s>
Although	O
Arena	B-Application
ran	O
well	O
,	O
there	O
were	O
inconsistent	O
reports	O
about	O
the	O
speed	O
of	O
Arena	B-Application
.	O
</s>
<s>
The	O
biggest	O
problems	O
were	O
that	O
Arena	B-Application
could	O
n't	O
handle	O
forms	O
,	O
and	O
that	O
the	O
PNG	O
support	O
was	O
broken	O
from	O
version	O
0.3.07	O
on	O
.	O
</s>
<s>
Earlier	O
Arena	B-Application
releases	O
had	O
full	O
alpha-channel	B-Algorithm
support	O
,	O
but	O
only	O
with	O
using	O
Arena	B-Application
's	O
own	O
"	O
sandy	O
"	O
background	O
pattern	O
.	O
</s>
<s>
The	O
animated	O
GIFs	O
extension	O
–	O
presented	O
by	O
Netscape	B-Protocol
in	O
March	O
1996	O
–	O
did	O
not	O
work	O
properly	O
.	O
</s>
<s>
Other	O
problems	O
included	O
rendering	O
problems	O
with	O
tables	O
,	O
and	O
the	O
lack	O
of	O
integration	O
of	O
so-called	O
extended	O
HTML	B-Language
code	I-Language
,	O
i.e.	O
</s>
<s>
Earlier	O
versions	O
of	O
Arena	B-Application
(	O
until	O
0.3.26	O
(	O
01.06.97	O
)	O
)	O
did	O
not	O
support	O
the	O
email	O
MIME	B-Protocol
.	O
</s>
