<s>
The	O
Hollerith	B-Device
Electronic	I-Device
Computer	I-Device
(	O
HEC	O
)	O
was	O
produced	O
by	O
the	O
British	O
Tabulating	O
Machine	O
Company	O
(	O
BTM	O
)	O
and	O
was	O
based	O
on	O
a	O
design	O
by	O
Professor	O
Andrew	O
Booth	O
of	O
Birkbeck	O
College	O
,	O
London	O
.	O
</s>
<s>
In	O
1950	O
John	O
Womersley	O
,	O
who	O
had	O
previously	O
led	O
the	O
team	O
developing	O
the	O
Automatic	B-Device
Computing	I-Device
Engine	I-Device
(	O
ACE	B-Device
)	O
at	O
the	O
National	O
Physical	O
Laboratory	O
(	O
NPL	O
)	O
,	O
joined	O
the	O
Unit	O
record	O
equipment	O
company	O
,	O
BTM	O
.	O
</s>
<s>
The	O
BRRA	O
had	O
sponsored	O
him	O
to	O
develop	O
what	O
became	O
the	O
All	O
Purpose	O
Electronic	O
Computer	O
(	O
APEXC	B-Device
)	O
.	O
</s>
<s>
He	O
needed	O
punched	B-Architecture
card	I-Architecture
input	O
and	O
output	O
technologies	O
and	O
struck	O
a	O
deal	O
with	O
BTM	O
,	O
whereby	O
they	O
supplied	O
him	O
with	O
these	O
in	O
return	O
for	O
their	O
copying	O
the	O
machine	O
that	O
he	O
was	O
developing	O
,	O
including	O
its	O
magnetic	B-General_Concept
drum	I-General_Concept
memory	I-General_Concept
.	O
</s>
