<s>
ECCE	O
(	O
the	O
Edinburgh	B-Application
Compatible	I-Application
Context	I-Application
Editor	I-Application
)	O
is	O
a	O
text	B-Application
editor	I-Application
for	O
computing	O
systems	O
and	O
operating	O
environments	O
that	O
support	O
a	O
command	B-Application
line	I-Application
interface	I-Application
.	O
</s>
<s>
The	O
current	O
ECCE	O
release	O
is	O
licensed	O
under	O
the	O
BSD	B-Operating_System
License	I-Operating_System
,	O
recoded	O
into	O
C	B-Language
and	O
released	O
by	O
Graham	O
Toal	O
in	O
2007	O
.	O
</s>
<s>
Hamish	O
Dewar	O
in	O
the	O
early	O
1960s	O
recognised	O
a	O
need	O
for	O
a	O
more	O
powerful	O
text	B-Application
editor	I-Application
.	O
</s>
<s>
ECCE	O
became	O
the	O
default	O
text	B-Application
editor	I-Application
for	O
computers	O
at	O
the	O
University	O
of	O
Edinburgh	O
and	O
remained	O
almost	O
unchanged	O
for	O
a	O
period	O
of	O
almost	O
25	O
years	O
.	O
</s>
<s>
ECCE	O
became	O
one	O
of	O
the	O
most	O
popular	O
and	O
well	O
respected	O
text	B-Application
editors	I-Application
of	O
the	O
1970s	O
.	O
</s>
<s>
ECCE	O
was	O
originally	O
written	O
in	O
Imp	B-Language
(	O
a	O
language	O
created	O
at	O
Edinburgh	O
University	O
)	O
the	O
second	O
implementation	O
was	O
coded	O
in	O
PDP-8	B-Device
assembler	O
and	O
was	O
ported	O
to	O
numerous	O
other	O
platforms	O
.	O
</s>
<s>
Sources	O
are	O
known	O
to	O
exist	O
in	O
Imp	B-Language
,	O
Fortran	B-Application
,	O
BCPL	B-Language
,	O
Pascal	B-Application
,	O
BBC	B-Language
Basic	I-Language
,	O
LC	O
,	O
C	B-Language
,	O
and	O
various	O
assembly	O
languages	O
.	O
</s>
<s>
further	O
ports	O
to	O
CORAL66	B-Language
,	O
ICL	B-General_Concept
VME	I-General_Concept
,	O
and	O
Babbage	B-Device
were	O
known	O
to	O
once	O
exist	O
but	O
may	O
have	O
become	O
extinct	O
.	O
</s>
