<s>
NCSA	B-Application
HTTPd	I-Application
is	O
an	O
early	O
,	O
now	O
discontinued	O
,	O
web	B-Application
server	I-Application
originally	O
developed	O
at	O
the	O
NCSA	B-General_Concept
at	O
the	O
University	O
of	O
Illinois	O
at	O
Urbana	O
–	O
Champaign	O
by	O
Robert	O
McCool	O
and	O
others	O
.	O
</s>
<s>
First	O
released	O
in	O
1993	O
,	O
it	O
was	O
among	O
the	O
earliest	O
web	B-Application
servers	I-Application
developed	O
,	O
following	O
Tim	O
Berners-Lee	O
'	O
s	O
CERN	B-Application
httpd	I-Application
,	O
Tony	O
Sanders	O
 '	O
Plexus	O
server	O
,	O
and	O
some	O
others	O
.	O
</s>
<s>
It	O
was	O
for	O
some	O
time	O
the	O
natural	O
counterpart	O
to	O
the	O
Mosaic	B-Application
web	I-Application
browser	I-Application
in	O
the	O
client	B-Operating_System
–	I-Operating_System
server	I-Operating_System
World	O
Wide	O
Web	O
.	O
</s>
<s>
It	O
also	O
introduced	O
the	O
Common	B-Language
Gateway	I-Language
Interface	I-Language
,	O
allowing	O
for	O
the	O
creation	O
of	O
dynamic	O
websites	O
.	O
</s>
<s>
After	O
Robert	O
McCool	O
left	O
NCSA	B-General_Concept
in	O
mid-1994	O
,	O
the	O
development	O
of	O
NCSA	B-Application
HTTPd	I-Application
slowed	O
greatly	O
.	O
</s>
<s>
An	O
independent	O
effort	O
,	O
the	O
Apache	B-Application
project	O
,	O
took	O
the	O
codebase	O
and	O
continued	O
;	O
meanwhile	O
,	O
NCSA	B-General_Concept
released	O
one	O
more	O
version	O
(	O
1.5	O
)	O
,	O
then	O
ceased	O
development	O
.	O
</s>
<s>
In	O
August	O
1995	O
,	O
NCSA	B-Application
HTTPd	I-Application
powered	O
most	O
of	O
all	O
web	B-Application
servers	I-Application
on	O
the	O
Internet	O
;	O
nearly	O
all	O
of	O
them	O
quickly	O
switched	O
over	O
to	O
Apache	B-Application
.	O
</s>
<s>
By	O
April	O
1996	O
,	O
Apache	B-Application
passed	O
NCSA	B-Application
HTTPd	I-Application
as	O
the	O
No	O
.	O
</s>
