<s>
Windows	B-Application
3.1	I-Application
is	O
a	O
major	O
release	O
of	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
It	O
was	O
released	O
to	O
manufacturing	O
on	O
April	O
6	O
,	O
1992	O
,	O
as	O
a	O
successor	O
to	O
Windows	B-Application
3.0	I-Application
.	O
</s>
<s>
Like	O
its	O
predecessors	O
,	O
the	O
Windows	B-Application
3.1	I-Application
series	O
ran	O
as	O
a	O
shell	B-Operating_System
on	O
top	O
of	O
MS-DOS	B-Application
.	O
</s>
<s>
Codenamed	O
Janus	O
,	O
Windows	B-Application
3.1	I-Application
introduced	O
the	O
TrueType	O
font	O
system	O
as	O
a	O
competitor	O
to	O
Adobe	B-Operating_System
Type	I-Operating_System
Manager	I-Operating_System
.	O
</s>
<s>
Its	O
multimedia	O
was	O
also	O
expanded	O
,	O
and	O
screensavers	B-General_Concept
were	O
introduced	O
,	O
alongside	O
new	O
software	O
such	O
as	O
Windows	B-Device
Media	I-Device
Player	I-Device
and	O
Sound	B-Application
Recorder	I-Application
.	O
</s>
<s>
File	B-Application
Manager	I-Application
and	O
Control	O
Panel	O
received	O
tweaks	O
,	O
while	O
Windows	B-Application
3.1	I-Application
also	O
saw	O
the	O
introduction	O
of	O
Windows	B-Protocol
Registry	I-Protocol
and	O
add-ons	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
remains	O
a	O
16-bit	B-Device
operating	O
environment	O
,	O
although	O
it	O
can	O
run	O
more	O
RAM	B-Architecture
.	O
</s>
<s>
Microsoft	O
also	O
released	O
special	O
versions	O
of	O
Windows	B-Application
3.1	I-Application
throughout	O
1992	O
and	O
1993	O
;	O
in	O
Europe	O
and	O
Japan	O
,	O
Windows	B-Application
3.1	I-Application
was	O
introduced	O
with	O
more	O
language	O
support	O
,	O
while	O
Tandy	B-Operating_System
Video	I-Operating_System
Information	I-Operating_System
System	I-Operating_System
received	O
a	O
special	O
version	O
,	O
called	O
Modular	O
Windows	O
.	O
</s>
<s>
In	O
November	O
1993	O
,	O
Windows	O
3.11	O
was	O
released	O
as	O
a	O
minor	O
update	O
,	O
while	O
Windows	O
3.2	O
was	O
released	O
as	O
a	O
Simplified	O
Chinese	O
version	O
of	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
Microsoft	O
also	O
introduced	O
Windows	O
for	O
Workgroups	O
,	O
the	O
first	O
version	O
of	O
Windows	O
to	O
allow	O
integrated	B-Architecture
networking	I-Architecture
.	O
</s>
<s>
Mostly	O
orientated	O
towards	O
businesses	O
,	O
it	O
received	O
network	O
improvements	O
and	O
it	O
allowed	O
users	O
to	O
share	O
files	B-Operating_System
,	O
use	O
print	B-Application
servers	I-Application
,	O
and	O
chat	B-Protocol
online	I-Protocol
,	O
while	O
it	O
also	O
introduced	O
peer-to-peer	O
networking	O
.	O
</s>
<s>
It	O
was	O
praised	O
for	O
its	O
reinvigoration	O
of	O
the	O
user	B-Application
interface	I-Application
and	O
technical	O
design	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
sold	O
over	O
three	O
million	O
copies	O
during	O
the	O
first	O
three	O
months	O
of	O
its	O
release	O
,	O
although	O
its	O
counterpart	O
Windows	O
for	O
Workgroups	O
was	O
noted	O
as	O
a	O
"	O
business	O
disappointment	O
"	O
due	O
to	O
its	O
small	O
amount	O
of	O
sold	O
copies	O
.	O
</s>
<s>
It	O
was	O
succeeded	O
by	O
Windows	B-Device
NT	I-Device
3.1	I-Device
and	O
Windows	B-Application
95	I-Application
,	O
and	O
Microsoft	O
ended	O
the	O
support	O
for	O
Windows	B-Application
3.1	I-Application
series	O
on	O
December	O
31	O
,	O
2001	O
,	O
except	O
for	O
the	O
embedded	B-Architecture
version	O
,	O
which	O
was	O
retired	O
in	O
2008	O
.	O
</s>
<s>
Windows	B-Application
3.0	I-Application
,	O
the	O
predecessor	O
of	O
3.1	O
,	O
was	O
released	O
in	O
1990	O
,	O
and	O
is	O
considered	O
to	O
be	O
the	O
first	O
version	O
of	O
Windows	O
to	O
receive	O
critical	O
acclaim	O
.	O
</s>
<s>
Windows	B-Application
3.0	I-Application
received	O
around	O
10	O
million	O
sales	O
before	O
the	O
release	O
of	O
Windows	B-Application
3.1	I-Application
on	O
April	O
6	O
,	O
1992	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
was	O
codenamed	O
Janus	O
.	O
</s>
<s>
Like	O
its	O
predecessors	O
,	O
the	O
operating	O
environment	O
runs	O
as	O
a	O
shell	B-Operating_System
on	O
top	O
of	O
MS-DOS	B-Application
,	O
although	O
it	O
does	O
not	O
include	O
the	O
MS-DOS	B-Application
Executive	O
shell	B-Operating_System
.	O
</s>
<s>
After	O
the	O
introduction	O
of	O
Windows	B-Application
1.0	I-Application
,	O
Microsoft	O
had	O
worked	O
on	O
gaining	O
support	O
from	O
companies	O
to	O
expand	O
its	O
operating	O
environment	O
on	O
different	O
types	O
on	O
PCs	B-Device
.	O
</s>
<s>
Tandy	O
Corporation	O
was	O
open	O
to	O
shipping	O
Tandy	O
Sensation	O
PCs	B-Device
with	O
the	O
Windows	B-Application
3.1	I-Application
operating	O
environment	O
.	O
</s>
<s>
IBM	O
and	O
its	O
PCs	B-Device
were	O
also	O
provided	O
with	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
Further	O
enhancements	O
were	O
introduced	O
in	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
The	O
TrueType	O
font	O
system	O
was	O
introduced	O
to	O
provide	O
scalable	O
fonts	O
to	O
Windows	B-Application
applications	I-Application
,	O
without	O
having	O
to	O
resort	O
on	O
using	O
third-party	O
technology	O
such	O
as	O
Adobe	B-Operating_System
Type	I-Operating_System
Manager	I-Operating_System
(	O
ATM	O
)	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
introduced	O
Arial	O
,	O
Courier	O
New	O
,	O
and	O
Times	O
New	O
Roman	O
fonts	O
,	O
in	O
regular	O
,	O
bold	O
,	O
italic	O
,	O
and	O
bold-italic	O
versions	O
,	O
which	O
could	O
be	O
scaled	O
to	O
any	O
size	O
and	O
rotated	O
,	O
depending	O
on	O
the	O
application	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
is	O
also	O
noted	O
for	O
its	O
improvement	O
of	O
multimedia	O
;	O
screensavers	B-General_Concept
,	O
Windows	B-Device
Media	I-Device
Player	I-Device
,	O
and	O
Sound	B-Application
Recorder	I-Application
were	O
introduced	O
into	O
the	O
operating	O
environment	O
.	O
</s>
<s>
These	O
features	O
were	O
already	O
present	O
on	O
the	O
Windows	B-Application
3.0	I-Application
with	O
Multimedia	O
Extensions	O
version	O
,	O
although	O
they	O
were	O
only	O
available	O
to	O
users	O
with	O
newly-bought	O
PCs	B-Device
.	O
</s>
<s>
The	O
Media	B-Device
Player	I-Device
could	O
play	O
MIDI	O
music	O
files	B-Operating_System
and	O
AVI	O
video	O
files	B-Operating_System
,	O
while	O
the	O
Sound	B-Application
Recorder	I-Application
could	O
play	O
,	O
record	O
,	O
and	O
edit	O
sound	O
files	B-Operating_System
that	O
were	O
affiliated	O
with	O
the	O
WAV	O
format	O
.	O
</s>
<s>
Minesweeper	B-Application
was	O
officially	O
introduced	O
in	O
Windows	B-Application
3.1	I-Application
as	O
a	O
replacement	O
for	O
Reversi	O
,	O
alongside	O
Solitaire	B-Application
.	O
</s>
<s>
MS-DOS	B-Application
programs	O
were	O
previously	O
not	O
able	O
to	O
be	O
controlled	O
with	O
a	O
mouse	B-Device
;	O
this	O
ended	O
up	O
being	O
introduced	O
in	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
File	B-Application
Manager	I-Application
had	O
also	O
received	O
tweaks	O
;	O
split	O
view-mode	O
was	O
introduced	O
,	O
users	O
were	O
now	O
able	O
to	O
browse	O
files	B-Operating_System
without	O
having	O
to	O
open	O
separate	O
windows	O
,	O
while	O
files	B-Operating_System
were	O
able	O
to	O
be	O
dragged	O
and	O
dropped	O
to	O
other	O
locations	O
on	O
the	O
system	O
.	O
</s>
<s>
An	O
option	O
for	O
quick	O
formatting	O
was	O
introduced	O
to	O
format	O
floppy	B-Device
disks	I-Device
and	O
copy	O
its	O
files	B-Operating_System
without	O
having	O
to	O
quit	O
Windows	O
.	O
</s>
<s>
File	B-Application
Manager	I-Application
is	O
an	O
MDI	O
application	O
that	O
is	O
used	O
for	O
moving	O
,	O
deleting	O
,	O
and	O
managing	O
files	B-Operating_System
on	O
the	O
system	O
.	O
</s>
<s>
Microsoft	O
also	O
built	O
Microsoft	B-Application
Bob	I-Application
,	O
a	O
utility	O
that	O
would	O
act	O
as	O
a	O
search	O
assistant	O
,	O
on	O
Windows	B-Application
3.1	I-Application
,	O
only	O
for	O
it	O
to	O
be	O
released	O
on	O
Windows	B-Application
95	I-Application
in	O
1995	O
.	O
</s>
<s>
The	O
introduction	O
of	O
Windows	B-Protocol
Registry	I-Protocol
,	O
a	O
centralized	O
database	O
that	O
can	O
store	O
configuration	O
information	O
and	O
settings	O
for	O
various	O
operating	O
systems	O
components	O
and	O
applications	O
,	O
also	O
occurred	O
in	O
this	O
version	O
.	O
</s>
<s>
The	O
Control	O
Panel	O
also	O
received	O
changes	O
;	O
its	O
items	O
were	O
now	O
hard-coded	O
,	O
and	O
additional	O
items	O
could	O
be	O
added	O
by	O
placing	O
additional	O
.cpl	O
files	B-Operating_System
.	O
</s>
<s>
Similarly	O
,	O
the	O
Calendar	B-Protocol
uses	O
the	O
.cal	O
extension	O
.	O
</s>
<s>
Several	O
printer	O
drivers	O
were	O
improved	O
in	O
Windows	B-Application
3.1	I-Application
,	O
making	O
the	O
Print	O
Manager	O
more	O
efficient	O
to	O
use	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
also	O
includes	O
troubleshooting	O
and	O
diagnostic	O
tools	O
such	O
as	O
the	O
Dr.	O
Watson	O
utility	O
which	O
saves	O
information	O
about	O
application	O
errors	O
,	O
and	O
Microsoft	B-Application
Diagnostics	I-Application
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
also	O
includes	O
add-ons	O
;	O
Video	B-Device
for	I-Device
Windows	I-Device
was	O
introduced	O
in	O
November	O
1992	O
as	O
a	O
reaction	O
to	O
Apple	O
's	O
QuickTime	B-Application
technology	O
.	O
</s>
<s>
It	O
was	O
later	O
built	O
into	O
Windows	B-Application
95	I-Application
.	O
</s>
<s>
Microsoft	O
also	O
published	O
Windows	B-Device
for	I-Device
Pen	I-Device
Computing	I-Device
,	O
a	O
pen	O
computing	O
interface	O
which	O
was	O
created	O
in	O
response	O
to	O
PenPoint	B-Application
OS	I-Application
by	O
GO	O
Corporation	O
.	O
</s>
<s>
The	O
operating	O
environment	O
was	O
also	O
given	O
limited	O
compatibility	O
with	O
the	O
then-new	O
32-bit	B-Application
Windows	I-Application
API	O
,	O
by	O
introducing	O
Win32s	B-Library
,	O
an	O
enabling	O
technology	O
.	O
</s>
<s>
Microsoft	O
also	O
provided	O
WinG	O
,	O
an	O
application	O
program	O
interface	O
,	O
to	O
entice	O
developers	O
to	O
move	O
from	O
DOS	B-Device
to	O
Windows	O
.	O
</s>
<s>
Unlike	O
all	O
previous	O
versions	O
,	O
Windows	B-Application
3.1	I-Application
cannot	O
run	O
in	O
real	B-Application
mode	I-Application
and	O
it	O
insists	O
on	O
the	O
use	O
of	O
80286	B-General_Concept
processors	O
or	O
above	O
.	O
</s>
<s>
When	O
running	O
Windows	B-Application
3.1	I-Application
in	O
the	O
386	B-General_Concept
enhanced	O
mode	O
,	O
the	O
limit	O
is	O
256	O
MB	O
,	O
in	O
comparison	O
with	O
the	O
previous	O
16	O
MB	O
.	O
</s>
<s>
While	O
Windows	B-Application
3.0	I-Application
was	O
limited	O
to	O
16	O
MB	O
maximum	O
memory	O
,	O
Windows	B-Application
3.1	I-Application
can	O
access	O
a	O
theoretical	O
4	O
GB	O
in	O
the	O
386	B-General_Concept
enhanced	O
mode	O
.	O
</s>
<s>
Like	O
its	O
predecessors	O
,	O
it	O
runs	O
as	O
a	O
16-bit	B-Device
version	O
of	O
Windows	O
.	O
</s>
<s>
It	O
is	O
also	O
the	O
first	O
Windows	O
to	O
be	O
distributed	O
on	O
a	O
CD-ROM	B-Device
.	O
</s>
<s>
Microsoft	O
also	O
published	O
an	O
online	O
tutorial	O
for	O
users	O
regarding	O
the	O
use	O
of	O
Windows	B-Application
3.1	I-Application
user	B-Application
interface	I-Application
.	O
</s>
<s>
A	O
special	O
version	O
named	O
"	O
Windows	B-Application
3.1	I-Application
for	O
Central	O
and	O
Eastern	O
Europe	O
"	O
introduced	O
eleven	O
languages	O
to	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
To	O
use	O
Czech	O
,	O
Hungarian	O
,	O
and	O
Polish	O
terminologies	O
this	O
version	O
was	O
required	O
,	O
while	O
to	O
use	O
Russian	O
terminologies	O
a	O
Russian	O
version	O
of	O
Windows	B-Application
3.1	I-Application
was	O
needed	O
.	O
</s>
<s>
It	O
was	O
a	O
special	O
version	O
of	O
Windows	B-Application
3.1	I-Application
,	O
which	O
was	O
designed	O
to	O
run	O
on	O
Tandy	B-Operating_System
Video	I-Operating_System
Information	I-Operating_System
System	I-Operating_System
;	O
it	O
allowed	O
users	O
to	O
run	O
multimedia	O
software	O
without	O
having	O
to	O
buy	O
a	O
personal	B-Device
computer	I-Device
.	O
</s>
<s>
It	O
also	O
contained	O
a	O
software	B-Application
development	I-Application
kit	I-Application
(	O
SDK	O
)	O
for	O
programmers	O
to	O
write	O
applications	O
that	O
would	O
run	O
on	O
devices	O
that	O
have	O
Modular	O
Windows	O
.	O
</s>
<s>
Released	O
on	O
November	O
8	O
,	O
1993	O
,	O
Windows	O
3.11	O
was	O
introduced	O
with	O
repairs	O
for	O
network	O
problems	O
which	O
were	O
present	O
on	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
It	O
also	O
did	O
not	O
run	O
on	O
IBM	O
's	O
OS/2	B-Application
for	I-Application
Windows	I-Application
.	O
</s>
<s>
Microsoft	O
replaced	O
all	O
retail	O
and	O
OEM	O
versions	O
of	O
Windows	B-Application
3.1	I-Application
with	O
Windows	O
3.11	O
and	O
provided	O
a	O
free	O
upgrade	O
to	O
anyone	O
who	O
owned	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
An	O
updated	O
Simplified	O
Chinese	O
version	O
of	O
Windows	B-Application
3.1	I-Application
was	O
released	O
in	O
November	O
1993	O
,	O
as	O
Windows	O
3.2	O
.	O
</s>
<s>
Windows	O
for	O
Workgroups	O
served	O
as	O
an	O
update	O
to	O
Windows	B-Application
3.1	I-Application
,	O
and	O
it	O
was	O
the	O
first	O
version	O
of	O
Windows	O
that	O
was	O
suitable	O
for	O
integrated	B-Architecture
networking	I-Architecture
.	O
</s>
<s>
Initially	O
developed	O
as	O
an	O
add-on	O
for	O
Windows	B-Application
3.0	I-Application
,	O
it	O
was	O
later	O
released	O
in	O
1992	O
.	O
</s>
<s>
Codenamed	O
Winball	O
and	O
Sparta	O
,	O
it	O
allows	O
users	O
to	O
share	O
files	B-Operating_System
,	O
use	O
print	B-Application
servers	I-Application
,	O
and	O
chat	B-Protocol
online	I-Protocol
;	O
files	B-Operating_System
could	O
be	O
accessed	O
from	O
other	O
machines	O
that	O
run	O
either	O
Windows	O
or	O
DOS	B-Device
.	O
</s>
<s>
The	O
Microsoft	B-Application
Hearts	I-Application
card	O
game	O
was	O
also	O
added	O
,	O
while	O
Object	O
Linking	O
and	O
Embedding	O
,	O
which	O
was	O
implemented	O
in	O
Windows	B-Application
3.1	I-Application
,	O
was	O
also	O
included	O
in	O
the	O
Windows	O
for	O
Workgroups	O
version	O
.	O
</s>
<s>
The	O
Workgroups	O
version	O
also	O
introduced	O
the	O
Microsoft	B-Application
Mail	I-Application
program	O
,	O
which	O
allowed	O
users	O
to	O
receive	O
and	O
send	O
email	O
,	O
and	O
Microsoft	B-Application
Schedule+	I-Application
,	O
a	O
time	O
management	O
app	O
.	O
</s>
<s>
Windows	O
for	O
Workgroups	O
can	O
also	O
be	O
accessed	O
from	O
an	O
OS/2	B-Application
client	O
that	O
uses	O
the	O
Server	B-Operating_System
Message	I-Operating_System
Block	I-Operating_System
(	O
SMB	O
)	O
,	O
a	O
protocol	O
used	O
for	O
sharing	O
files	B-Operating_System
and	O
printers	O
over	O
local	B-General_Concept
networks	I-General_Concept
.	O
</s>
<s>
It	O
introduced	O
support	O
for	O
the	O
NetBEUI	B-Protocol
protocol	O
.	O
</s>
<s>
The	O
price	O
sat	O
at	O
$69	O
for	O
Windows	B-Application
3.1	I-Application
users	O
.	O
</s>
<s>
It	O
was	O
codenamed	O
Snowball	O
,	O
and	O
it	O
introduced	O
support	O
for	O
32-bit	B-Device
file	I-Device
access	I-Device
,	O
drive	O
sharing	O
,	O
and	O
group	O
calendaring	O
.	O
</s>
<s>
It	O
received	O
network	O
improvements	O
;	O
a	O
Winsock	B-Application
package	O
was	O
released	O
for	O
Windows	O
for	O
Workgroups	O
,	O
although	O
it	O
was	O
later	O
replaced	O
by	O
a	O
32-bit	O
stack	O
add-on	O
package	O
(	O
codenamed	O
Wolverine	O
)	O
that	O
provided	O
TCP/IP	B-Protocol
support	O
in	O
Windows	O
for	O
Workgroups	O
3.11	O
.	O
</s>
<s>
Its	O
connectivity	O
with	O
NetWare	B-Operating_System
networks	O
was	O
increased	O
,	O
while	O
it	O
also	O
introduced	O
support	O
for	O
Open	B-General_Concept
Data-Link	I-General_Concept
Interface	I-General_Concept
cards	O
and	O
Internetwork	B-Protocol
Packet	I-Protocol
Exchange	I-Protocol
drivers	O
.	O
</s>
<s>
Remote	B-Device
access	I-Device
service	I-Device
was	O
introduced	O
as	O
a	O
product	O
for	O
users	O
to	O
remotely	O
access	O
Windows	B-Device
NT	I-Device
and	O
its	O
advanced	O
server	O
nets	O
.	O
</s>
<s>
It	O
runs	O
in	O
80386	B-General_Concept
enhanced	O
mode	O
,	O
and	O
it	O
supports	O
the	O
use	O
of	O
network	B-Operating_System
redirectors	I-Operating_System
.	O
</s>
<s>
The	O
official	O
system	O
requirements	O
for	O
Windows	B-Application
3.1	I-Application
and	O
following	O
versions	O
include	O
the	O
following	O
.	O
</s>
<s>
The	O
amount	O
of	O
RAM	B-Architecture
is	O
dependent	O
on	O
software	O
that	O
runs	O
on	O
the	O
PC	O
;	O
if	O
the	O
user	O
is	O
on	O
the	O
network	O
and	O
if	O
the	O
network	O
requires	O
a	O
lot	O
of	O
memory	O
,	O
more	O
RAM	B-Architecture
will	O
be	O
needed	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
includes	O
more	O
drivers	O
for	O
printers	O
than	O
its	O
predecessor	O
.	O
</s>
<s>
It	O
is	O
also	O
possible	O
to	O
connect	O
on	O
to	O
a	O
network	O
using	O
Windows	B-Application
3.1	I-Application
via	O
Hayes	O
,	O
Multi-Tech	O
,	O
or	O
Trail	O
Blazer	O
modems	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
is	O
considered	O
to	O
be	O
more	O
stable	O
and	O
multimedia-friendly	O
in	O
comparison	O
with	O
its	O
predecessor	O
,	O
while	O
its	O
user	B-Application
interface	I-Application
was	O
reinvigorated	O
.	O
</s>
<s>
It	O
has	O
been	O
shown	O
as	O
an	O
improvement	O
,	O
and	O
it	O
possesses	O
more	O
features	O
in	O
comparison	O
with	O
its	O
rival	O
IBM	B-Application
OS/2	I-Application
2.0	O
,	O
which	O
launched	O
a	O
month	O
earlier	O
than	O
Windows	B-Application
3.1	I-Application
.	O
</s>
<s>
Regarding	O
the	O
marketplace	O
,	O
Windows	B-Application
3.1	I-Application
had	O
received	O
an	O
enthusiastic	O
reception	O
;	O
its	O
retail	O
price	O
sat	O
at	O
$149	O
,	O
and	O
over	O
three	O
million	O
copies	O
of	O
Windows	B-Application
3.1	I-Application
were	O
sold	O
in	O
the	O
first	O
three	O
months	O
.	O
</s>
<s>
The	O
year	O
of	O
Windows	B-Application
3.1	I-Application
'	O
s	O
release	O
was	O
successful	O
for	O
Microsoft	O
,	O
which	O
was	O
named	O
the	O
"	O
Most	O
Innovative	O
Company	O
Operating	O
in	O
the	O
U.S.	O
"	O
by	O
Fortune	O
magazine	O
,	O
while	O
Windows	O
became	O
the	O
most	O
widely	O
used	O
GUI-based	O
operating	O
environment	O
.	O
</s>
<s>
Microsoft	O
ended	O
its	O
support	O
for	O
Windows	B-Application
3.1	I-Application
and	O
Windows	O
for	O
Workgroups	O
on	O
December	O
31	O
,	O
2001	O
,	O
although	O
the	O
embedded	B-Architecture
version	O
of	O
Windows	O
for	O
Workgroups	O
3.11	O
was	O
retired	O
on	O
November	O
1	O
,	O
2008	O
.	O
</s>
<s>
The	O
operating	O
environment	O
was	O
superseded	O
by	O
Windows	B-Device
NT	I-Device
3.1	I-Device
,	O
which	O
was	O
released	O
in	O
1993	O
,	O
and	O
Windows	B-Application
95	I-Application
in	O
1995	O
.	O
</s>
<s>
The	O
installer	O
of	O
the	O
beta	O
release	O
used	O
code	O
that	O
checked	O
whether	O
it	O
was	O
running	O
on	O
Microsoft-licensed	O
DOS	B-Device
or	O
another	O
DOS	B-Device
operating	O
system	O
,	O
such	O
as	O
DR-DOS	B-Application
.	O
</s>
<s>
It	O
was	O
known	O
as	O
AARD	O
code	O
,	O
and	O
Microsoft	O
disabled	O
it	O
before	O
the	O
final	O
release	O
of	O
Windows	B-Application
3.1	I-Application
,	O
though	O
without	O
removing	O
it	O
altogether	O
.	O
</s>
<s>
Digital	O
Research	O
,	O
who	O
owned	O
DR-DOS	B-Application
,	O
released	O
a	O
patch	O
within	O
weeks	O
to	O
allow	O
the	O
installer	O
to	O
continue	O
.	O
</s>
<s>
Memos	O
that	O
were	O
released	O
during	O
the	O
United	O
States	O
v	O
.	O
Microsoft	O
Corp	O
.	O
antitrust	O
case	O
in	O
1999	O
revealed	O
that	O
Microsoft	O
specifically	O
focused	O
it	O
on	O
DR-DOS	B-Application
.	O
</s>
<s>
When	O
Caldera	O
bought	O
DR-DOS	B-Application
from	O
Novell	O
,	O
they	O
brought	O
a	O
lawsuit	O
against	O
Microsoft	O
over	O
the	O
AARD	O
code	O
,	O
which	O
was	O
later	O
settled	O
with	O
Microsoft	O
paying	O
$280million	O
.	O
</s>
<s>
Windows	B-Application
3.1	I-Application
found	O
a	O
niche	O
market	O
as	O
an	O
embedded	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
after	O
becoming	O
obsolete	O
in	O
the	O
PC	O
world	O
.	O
</s>
<s>
It	O
also	O
sees	O
continued	O
use	O
as	O
an	O
embedded	B-Operating_System
OS	I-Operating_System
in	O
retail	O
cash	O
tills	O
.	O
</s>
<s>
On	O
July	O
14	O
,	O
2013	O
,	O
Linux	B-Operating_System
kernel	I-Operating_System
version	O
3.11	O
was	O
officially	O
named	O
"	O
Linux	B-Operating_System
For	O
Workgroups	O
"	O
as	O
a	O
tongue-in-cheek	O
reference	O
to	O
Windows	O
for	O
Workgroups	O
3.11	O
.	O
</s>
<s>
In	O
November	O
2015	O
,	O
the	O
failure	O
of	O
a	O
Windows	B-Application
3.1	I-Application
system	O
in	O
Orly	O
Airport	O
of	O
Paris	O
,	O
which	O
was	O
responsible	O
for	O
communicating	O
visual	O
range	O
information	O
in	O
foggy	O
weather	O
to	O
pilots	O
,	O
made	O
operations	O
temporarily	O
cease	O
.	O
</s>
<s>
In	O
2016	O
,	O
the	O
Internet	O
Archive	O
organization	O
released	O
Windows	B-Application
3.1	I-Application
as	O
an	O
emulated	O
environment	O
in	O
a	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
It	O
is	O
also	O
possible	O
to	O
install	O
Windows	B-Application
3.1	I-Application
through	O
an	O
emulator	O
on	O
an	O
iPad	B-Device
.	O
</s>
