<s>
Transaction	B-Operating_System
Management	I-Operating_System
eXecutive	I-Operating_System
or	O
TMX	O
was	O
NCR	O
Corporation	O
's	O
proprietary	B-Device
transaction	B-Application
processing	I-Application
system	I-Application
running	O
on	O
NCR	O
Tower	O
5000-series	O
systems	O
which	O
were	O
based	O
on	O
Motorola	O
680xx	B-Device
CPUs	B-Device
.	O
</s>
<s>
Basic	O
features	O
of	O
the	O
TMX	O
operating	B-General_Concept
system	I-General_Concept
are	O
listed	O
below	O
:	O
</s>
<s>
It	O
was	O
a	O
multiuser	B-Operating_System
,	O
multitasking	B-Operating_System
32-bit	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
It	O
featured	O
a	O
proprietary	B-Device
network	B-Architecture
called	O
LBN	O
(	O
Local	O
Branch	O
Network	B-Architecture
)	O
.	O
</s>
<s>
Later	O
versions	O
of	O
TMX	O
had	O
Token	B-Device
Ring	I-Device
support	O
which	O
was	O
called	O
LBN	O
Emulation	O
.	O
</s>
<s>
NCR	O
dumb	O
terminals	O
,	O
passbook	B-Operating_System
printers	O
,	O
cash	O
dispensers	O
,	O
magnetic	O
stripe	O
reader	O
and	O
pinpad	O
.	O
</s>
<s>
It	O
contained	O
SNA	B-Architecture
LU	O
emulations	O
for	O
mainframe	B-Architecture
connectivity	O
.	O
</s>
<s>
It	O
supported	O
a	O
flat	O
file	O
system	O
;	O
there	O
were	O
no	O
subdirectories	B-Application
.	O
</s>
<s>
Files	O
had	O
various	O
types	O
,	O
like	O
text	B-General_Concept
files	I-General_Concept
and	O
index	B-Application
sequential	I-Application
data	I-Application
files	I-Application
.	O
</s>
<s>
Main	O
programming	O
language	O
was	O
Whitesmiths	O
C	B-Language
,	O
but	O
the	O
compiler	B-Language
was	O
not	O
ANSI	O
C	B-Language
compliant	O
.	O
</s>
<s>
It	O
had	O
limited	O
memory	B-General_Concept
(	O
several	O
MB	O
)	O
and	O
disk	O
(	O
several	O
hundred	O
MB	O
)	O
.	O
</s>
<s>
NCR	O
Tower	O
5000	O
systems	O
were	O
also	O
capable	O
of	O
running	O
UNIX	B-Application
SVR3	B-Operating_System
version	O
.	O
</s>
