<s>
LPMud	O
,	O
abbreviated	O
LP	O
,	O
is	O
a	O
family	O
of	O
MUD	B-Application
server	O
software	O
.	O
</s>
<s>
LPMud	O
was	O
innovative	O
in	O
its	O
separation	O
of	O
the	O
MUD	B-Application
infrastructure	O
into	O
a	O
virtual	B-Architecture
machine	I-Architecture
(	O
known	O
as	O
the	O
driver	O
)	O
and	O
a	O
development	O
framework	O
written	O
in	O
the	O
LPC	O
programming	O
language	O
(	O
known	O
as	O
the	O
mudlib	O
)	O
.	O
</s>
<s>
Pensjö	O
had	O
been	O
an	O
avid	O
player	O
of	O
TinyMUD	O
and	O
AberMUD	B-Protocol
.	O
</s>
<s>
He	O
wanted	O
to	O
create	O
a	O
world	O
with	O
the	O
flexibility	O
of	O
TinyMUD	O
and	O
the	O
style	O
of	O
AberMUD	B-Protocol
.	O
</s>
<s>
By	O
allowing	O
wizards	B-Application
coding	O
rights	O
,	O
I	O
thought	O
others	O
could	O
help	O
me	O
with	O
this.	O
"	O
</s>
<s>
The	O
result	O
was	O
the	O
creation	O
of	O
a	O
new	O
,	O
C-based	O
,	O
object-oriented	B-Language
programming	I-Language
language	I-Language
,	O
LPC	O
,	O
that	O
made	O
it	O
simple	O
for	O
people	O
with	O
minimal	O
programming	O
skills	O
to	O
add	O
elements	O
like	O
rooms	O
,	O
weapons	O
,	O
and	O
monsters	O
to	O
a	O
virtual	O
world	O
.	O
</s>
<s>
To	O
accomplish	O
his	O
goal	O
,	O
Lennart	O
Augustsson	O
convinced	O
Pensjö	O
to	O
write	O
what	O
today	O
would	O
be	O
called	O
a	O
virtual	B-Architecture
machine	I-Architecture
,	O
the	O
LPMud	O
driver	O
.	O
</s>
<s>
The	O
driver	O
managed	O
the	O
interpretation	O
of	O
LPC	O
code	O
as	O
well	O
as	O
providing	O
basic	O
operating	B-General_Concept
system	I-General_Concept
services	O
to	O
the	O
LPC	O
code	O
.	O
</s>
<s>
By	O
virtue	O
of	O
this	O
design	O
,	O
Pensjö	O
made	O
it	O
more	O
difficult	O
for	O
common	O
programming	O
errors	O
like	O
infinite	B-Algorithm
loops	I-Algorithm
and	O
infinite	O
recursion	O
made	O
by	O
content	O
builders	O
to	O
harm	O
the	O
overall	O
stability	O
of	O
the	O
server	O
.	O
</s>
<s>
His	O
choice	O
of	O
an	O
OO	B-Language
approach	O
made	O
it	O
easy	O
for	O
new	O
programmers	O
to	O
concentrate	O
on	O
the	O
task	O
of	O
"	O
building	O
a	O
room	O
"	O
rather	O
than	O
programming	O
logic	O
.	O
</s>
<s>
Pensjö	O
's	O
interest	O
in	O
LPMuds	O
eventually	O
waned	O
in	O
the	O
early	O
1990s	O
,	O
but	O
by	O
that	O
time	O
LPMud	O
had	O
become	O
one	O
of	O
the	O
most	O
popular	O
forms	O
of	O
MUD	B-Application
.	O
</s>
<s>
Though	O
an	O
LPMud	O
server	O
can	O
be	O
used	O
to	O
implement	O
nearly	O
any	O
style	O
of	O
game	O
,	O
LPMuds	O
are	O
often	O
thought	O
of	O
as	O
having	O
certain	O
common	O
characteristics	O
as	O
a	O
genre	O
,	O
such	O
as	O
a	O
mixture	O
of	O
hack	B-Application
and	I-Application
slash	I-Application
with	O
role-playing	O
,	O
quests	O
as	O
an	O
element	O
of	O
advancement	O
,	O
and	O
"	O
guilds	O
"	O
as	O
an	O
alternative	O
to	O
character	O
classes	O
.	O
</s>
<s>
LPMud	O
was	O
used	O
as	O
the	O
basis	O
for	O
the	O
first	O
Internet	O
talker	B-Protocol
,	O
Cat	O
Chat	O
,	O
which	O
opened	O
in	O
1990	O
.	O
</s>
<s>
The	O
TMI	O
Mudlib	O
from	O
The	O
Mud	B-Application
Institute	O
was	O
an	O
attempt	O
to	O
create	O
a	O
framework	O
driven	O
mudlib	O
for	O
the	O
MudOS	O
LPMud	O
driver	O
.	O
</s>
<s>
Notable	O
MUDs	B-Application
based	O
on	O
TMI-derived	O
mudlibs	O
include	O
The	O
Two	O
Towers	O
set	O
in	O
Tolkien	O
’s	O
universe	O
and	O
Threshold	O
.	O
</s>
<s>
It	O
pioneered	O
important	O
technical	O
innovations	O
in	O
MUDs	B-Application
,	O
including	O
the	O
network	O
socket	O
support	O
that	O
made	O
InterMUD	O
communications	O
possible	O
and	O
LPC-to-C	O
compilation	O
.	O
</s>
<s>
Genocide	B-Protocol
was	O
an	O
important	O
development	O
testbed	O
for	O
MudOS	O
from	O
1992	O
to	O
1994	O
,	O
but	O
switched	O
back	O
to	O
the	O
main	O
LPMud	O
branch	O
,	O
citing	O
speed	O
concerns	O
.	O
</s>
<s>
FluffOS	B-Application
is	O
originally	O
forked	O
by	O
Wodan	O
from	O
Discworld	B-Application
MUD	I-Application
,	O
released	O
as	O
a	O
roll-up	O
patch	O
to	O
support	O
Discworld	B-Application
MUD	I-Application
.	O
</s>
<s>
Wodan	O
continues	O
to	O
maintain	O
FluffOS	B-Application
up	O
to	O
version	O
2.27	O
,	O
and	O
has	O
since	O
FluffOS	B-Application
been	O
maintained	O
by	O
Yucong	O
Sun	O
.	O
</s>
<s>
FluffOS	B-Application
right	O
now	O
has	O
release	O
version	O
2017	O
and	O
version	O
2019	O
in	O
development	O
.	O
</s>
<s>
The	O
FluffOS	B-Application
codebase	O
contains	O
source	O
release	O
of	O
MudOS	O
all	O
the	O
way	O
up	O
to	O
mudos-0.8.14	O
,	O
and	O
has	O
largely	O
maintained	O
backward	O
compatibility	O
for	O
LPMUD	O
code	O
written	O
for	O
MudOS	O
v22	O
,	O
with	O
many	O
more	O
modern	O
features	O
.	O
</s>
<s>
FluffOS	B-Application
v2019	O
uses	O
c++	B-Language
17	O
,	O
has	O
a	O
modern	O
cmake	O
build	O
system	O
,	O
and	O
able	O
to	O
compile	O
and	O
run	O
on	O
latest	O
Ubuntu	O
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
;	O
Native	O
windows	O
support	O
is	O
still	O
under	O
development	O
.	O
</s>
<s>
FluffOS	B-Application
is	O
already	O
being	O
deployed	O
in	O
production	O
with	O
a	O
lot	O
of	O
Chinese	O
LPMUDs	O
,	O
with	O
an	O
active	O
community	O
.	O
</s>
