<s>
The	O
8251	B-Device
is	O
a	O
Universal	O
Synchronous/Asynchronous	O
Receiver/Transmitter	O
(	O
USART	O
)	O
packaged	O
in	O
a	O
28-pin	O
DIP	O
made	O
by	O
Intel	O
.	O
</s>
<s>
It	O
is	O
commonly	O
confused	O
with	O
the	O
much	O
more	O
common	O
8250	B-Device
UART	I-Device
that	O
was	O
made	O
popular	O
as	O
the	O
serial	O
port	O
in	O
the	O
IBM	B-Device
Personal	I-Device
Computer	I-Device
.	O
</s>
