<s>
An	O
accounting	B-Device
machine	I-Device
,	O
or	O
bookkeeping	O
machine	O
or	O
recording-adder	O
,	O
was	O
generally	O
a	O
calculator	O
and	O
printer	O
combination	O
tailored	O
for	O
a	O
specific	O
commercial	O
activity	O
such	O
as	O
billing	O
,	O
payroll	O
,	O
or	O
ledger	O
.	O
</s>
<s>
Accounting	B-Device
machines	I-Device
were	O
widespread	O
from	O
the	O
early	O
1900s	O
to	O
1980s	O
,	O
but	O
were	O
rendered	O
obsolete	O
by	O
the	O
availability	O
of	O
low-cost	O
computers	O
such	O
as	O
the	O
IBM	B-Device
PC	I-Device
.	O
</s>
<s>
This	O
type	O
of	O
machine	O
is	O
generally	O
distinct	O
from	O
unit	O
record	O
equipment	O
(	O
some	O
unit	O
record	O
machines	O
were	O
also	O
called	O
accounting	B-Device
machines	I-Device
)	O
.	O
</s>
