<s>
Rxvt	B-Application
(	O
acronym	O
for	O
our	O
extended	O
virtual	O
terminal	O
)	O
is	O
a	O
terminal	B-Application
emulator	I-Application
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
,	O
and	O
in	O
the	O
form	O
of	O
a	O
Cygwin	B-Language
port	O
,	O
for	O
Windows	B-Application
.	O
</s>
<s>
Rxvt	B-Application
was	O
originally	O
written	O
by	O
Rob	O
Nation	O
and	O
later	O
extensively	O
modified	O
by	O
Mark	O
Olesen	O
,	O
who	O
took	O
over	O
maintenance	O
for	O
several	O
years	O
.	O
</s>
<s>
It	O
is	O
intended	O
to	O
be	O
a	O
slimmed-down	O
alternate	O
for	O
xterm	B-Language
,	O
omitting	O
some	O
of	O
its	O
little-used	O
features	O
,	O
like	O
Tektronix	B-General_Concept
4014	I-General_Concept
emulation	O
and	O
toolkit-style	O
configurability	O
.	O
</s>
<s>
The	O
latter	O
refers	O
to	O
the	O
Xt	O
resource	O
mechanism	O
,	O
e.g.	O
,	O
for	O
binding	O
keys	O
.	O
</s>
<s>
Rxvt	B-Application
is	O
an	O
extended	O
version	O
of	O
the	O
older	O
xvt	O
terminal	B-Application
emulator	I-Application
by	O
John	O
Bovey	O
of	O
the	O
University	O
of	O
Kent	O
.	O
</s>
<s>
The	O
name	O
originally	O
stood	O
for	O
"	O
Rob	O
's	O
xvt	O
"	O
(	O
with	O
XVT	O
stands	O
for	O
'	O
X	B-Operating_System
Virtual	O
Terminal	O
 '	O
)	O
,	O
but	O
was	O
later	O
re-dubbed	O
"	O
our	O
xvt	O
"	O
(	O
pronounced	O
like	O
the	O
letters	O
r-x-v-t	O
)	O
.	O
</s>
<s>
Aside	O
from	O
features	O
such	O
as	O
those	O
controlled	O
by	O
resource	O
files	O
,	O
rxvt	B-Application
's	O
terminal	B-Application
emulation	I-Application
differs	O
from	O
xterm	B-Language
in	O
two	O
important	O
ways	O
:	O
</s>
<s>
It	O
emulates	O
a	O
VT102	B-Device
,	O
rather	O
than	O
a	O
VT220	B-Device
.	O
</s>
<s>
That	O
means	O
that	O
it	O
handles	O
8-bit	O
data	O
differently	O
,	O
does	O
not	O
implement	O
the	O
C1	O
controls	O
that	O
xterm	B-Language
does	O
.	O
</s>
<s>
xterm	B-Language
does	O
implement	O
a	O
switch	O
"	O
-k8	O
"	O
to	O
suppress	O
that	O
functionality	O
;	O
rxvt	B-Application
does	O
not	O
provide	O
an	O
option	O
to	O
emulate	O
a	O
VT220	B-Device
.	O
</s>
<s>
xterm	B-Language
sends	O
strings	O
that	O
are	O
encoded	O
using	O
the	O
same	O
rules	O
as	O
the	O
ANSI/ISO	O
escape	O
sequences	O
.	O
</s>
<s>
Rxvt	B-Application
's	O
do	O
not	O
,	O
though	O
they	O
provide	O
comparable	O
flexibility	O
in	O
this	O
area	O
.	O
</s>
<s>
Newer	O
versions	O
of	O
rxvt	B-Application
have	O
primitive	O
support	O
for	O
pseudo-transparency	B-Device
.	O
</s>
<s>
The	O
rxvt	B-Application
distribution	O
also	O
includes	O
an	O
analog	O
clock	O
program	O
called	O
rclock	O
.	O
</s>
<s>
Very	O
old	O
distributions	O
included	O
a	O
copy	O
of	O
vttest	B-Device
,	O
but	O
dropped	O
that	O
in	O
1996	O
with	O
version	O
2.18	O
.	O
</s>
