<s>
TCPaccess	B-Protocol
is	O
a	O
software	O
product	O
which	O
implements	O
the	O
TCP/IP	B-Protocol
protocol	I-Protocol
suite	I-Protocol
on	O
IBM	O
mainframe	B-Architecture
computers	I-Architecture
using	O
the	O
MVS	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
It	O
was	O
developed	O
in	O
1986	O
by	O
Advanced	O
Computer	O
Communications	O
under	O
the	O
name	O
ACCES/MVS	O
,	O
and	O
was	O
the	O
first	O
commercial	O
TCP/IP	B-Protocol
implementation	O
for	O
MVS	B-Application
mainframes	B-Architecture
.	O
</s>
<s>
The	O
product	O
was	O
marketed	O
by	O
Cisco	O
Systems	O
as	O
Cisco	B-Protocol
IOS	I-Protocol
for	O
S/390	B-Device
.	O
</s>
<s>
It	O
is	O
currently	O
offered	O
by	O
Computer	O
Associates	O
as	O
Unicenter	O
TCPaccess	B-Protocol
Communications	O
Server	O
.	O
</s>
