<s>
Logical	O
Unit	O
6.2	O
is	O
an	O
IBM-originated	O
communications	O
protocol	O
specification	O
dating	O
from	O
1974	O
,	O
and	O
is	O
part	O
of	O
IBM	O
's	O
Systems	B-Architecture
Network	I-Architecture
Architecture	I-Architecture
(	O
SNA	O
)	O
.	O
</s>
<s>
LU6.2	B-Protocol
is	O
used	O
by	O
many	O
of	O
IBM	O
's	O
products	O
,	O
including	O
Common	B-Architecture
Programming	I-Architecture
Interface	I-Architecture
for	I-Architecture
Communications	I-Architecture
Intersystem	O
Communications	O
(	O
CICS	O
ISC	O
)	O
,	O
and	O
Information	B-Application
Management	I-Application
System	I-Application
,	O
and	O
also	O
many	O
non-IBM	O
products	O
.	O
</s>
<s>
LU	B-Protocol
6.2	I-Protocol
means	O
I	O
do	O
n't	O
have	O
to	O
write	O
the	O
software	O
communications	O
interfaces	O
.	O
</s>
<s>
If	O
I	O
have	O
one	O
office	O
server	O
in	O
a	O
DEC	O
environment	O
,	O
and	O
another	O
in	O
a	O
Wang	O
environment	O
…	O
I	O
can	O
use	O
the	O
LU	B-Protocol
6.2	I-Protocol
standard	O
to	O
pass	O
files	O
between	O
those	O
devices	O
,	O
and	O
I	O
do	O
n't	O
have	O
to	O
worry	O
about	O
things	O
like	O
block	O
checking	O
and	O
clock	O
.	O
</s>
<s>
Some	O
examples	O
of	O
non-IBM	O
products	O
which	O
implemented	O
the	O
SNA	O
stack	O
including	O
LU6.2	B-Protocol
are	O
:	O
Microsoft	B-Application
Host	I-Application
Integration	I-Application
Server	I-Application
,	O
and	O
NetWare	B-Operating_System
for	O
SAA	B-Device
.	O
</s>
<s>
APPC	B-Protocol
is	O
a	O
protocol	O
used	O
with	O
LU6.2	B-Protocol
architecture	O
.	O
</s>
<s>
APPC	B-Protocol
is	O
often	O
used	O
to	O
refer	O
to	O
the	O
LU6.2	B-Protocol
architecture	O
or	O
to	O
specific	O
LU6.2	B-Protocol
features	O
.	O
</s>
<s>
LU6.2-compliant	O
devices	O
operate	O
as	O
peers	O
within	O
the	O
network	O
and	O
can	O
perform	O
multiple	O
simultaneous	O
transactions	O
over	O
the	O
network	O
.	O
</s>
<s>
LU6.2	B-Protocol
devices	O
can	O
also	O
detect	O
and	O
correct	O
errors	O
.	O
</s>
<s>
The	O
LU6.2	B-Protocol
definition	O
provides	O
a	O
common	O
API	O
for	O
communicating	O
with	O
and	O
controlling	O
compliant	O
devices	O
.	O
</s>
<s>
Other	O
vendors	O
also	O
implemented	O
LU6.2	B-Protocol
in	O
their	O
own	O
products	O
and	O
with	O
their	O
own	O
APIs	O
.	O
</s>
<s>
IBM	O
later	O
defined	O
the	O
Common	B-Architecture
Programming	I-Architecture
Interface	I-Architecture
for	I-Architecture
Communications	I-Architecture
(	O
CPIC	O
)	O
API	O
which	O
would	O
eventually	O
become	O
widely	O
implemented	O
.	O
</s>
<s>
As	O
of	O
November	O
1987	O
,	O
of	O
207	O
large	O
US	O
companies	O
interviewed	O
"	O
Eighteen	O
percent	O
of	O
the	O
companies	O
said	O
they	O
have	O
implemented	O
LU	B-Protocol
6.2	I-Protocol
systems	O
already	O
,	O
and	O
51%	O
said	O
they	O
expect	O
to	O
have	O
such	O
systems	O
up	O
and	O
running	O
within	O
two	O
years.	O
"	O
</s>
