<s>
The	O
Darmstadt	B-Device
Electronic	I-Device
Computing	I-Device
Machine	I-Device
(	O
DERA	O
)	O
,	O
(	O
German:Darmstädter	O
Elektronischer	O
Rechenautomat	O
)	O
was	O
an	O
experimental	O
,	O
room-sized	O
electronic	O
computer	O
calculator	B-Application
with	O
vacuum	O
tube	O
built	O
in	O
1951	O
.	O
</s>
<s>
Programming	O
languages	O
:	O
in	O
addition	O
to	O
machine	O
code	O
also	O
ALGOL	B-Language
.	O
</s>
