<s>
Starting	O
in	O
1946	O
,	O
American	O
Airlines	O
developed	O
a	O
number	O
of	O
automated	O
airline	O
booking	O
systems	O
known	O
as	O
Reservisor	B-Device
.	O
</s>
<s>
Although	O
somewhat	O
successful	O
,	O
American	O
's	O
unhappiness	O
with	O
the	O
Reservisor	B-Device
systems	O
led	O
them	O
to	O
develop	O
the	O
computerized	O
Sabre	B-Application
system	O
used	O
to	O
this	O
day	O
.	O
</s>
<s>
Amman	O
approached	O
a	O
number	O
of	O
business	O
machine	O
vendors	O
about	O
building	O
the	O
system	O
he	O
referred	O
to	O
as	O
the	O
Reservisor	B-Device
,	O
but	O
most	O
proved	O
uninterested	O
.	O
</s>
<s>
Their	O
knowledge	O
of	O
remote	O
signaling	O
and	O
electrical	O
display	O
made	O
them	O
a	O
suitable	O
partner	O
for	O
the	O
Reservisor	B-Device
project	O
.	O
</s>
<s>
The	O
Reservisor	B-Device
was	O
essentially	O
an	O
electromechanical	O
version	O
of	O
the	O
flight	O
boards	O
introduced	O
for	O
the	O
"	O
sell	O
and	O
report	O
"	O
system	O
.	O
</s>
<s>
The	O
Reservisor	B-Device
was	O
installed	O
in	O
American	O
's	O
Boston	O
reservation	O
office	O
in	O
February	O
1946	O
.	O
</s>
<s>
Encouraged	O
by	O
the	O
Reservisor	B-Device
,	O
but	O
ultimately	O
unhappy	O
with	O
the	O
advantages	O
it	O
offered	O
,	O
Amman	O
started	O
examining	O
a	O
much	O
more	O
advanced	O
system	O
that	O
handled	O
not	O
only	O
the	O
availability	O
issues	O
,	O
but	O
the	O
actual	O
seat	O
inventory	O
as	O
well	O
.	O
</s>
<s>
At	O
about	O
this	O
time	O
,	O
Howard	O
Aiken	O
had	O
started	O
work	O
with	O
the	O
highly	O
publicized	O
Harvard	B-Device
Mark	I-Device
III	I-Device
computer	O
,	O
which	O
used	O
a	O
drum	B-General_Concept
memory	I-General_Concept
for	O
storage	O
.	O
</s>
<s>
The	O
resulting	O
Magnetronic	B-Device
Reservisor	I-Device
was	O
installed	O
in	O
American	O
's	O
La	O
Guardia	O
Airport	O
booking	O
office	O
in	O
1952	O
.	O
</s>
<s>
After	O
installing	O
the	O
Magnetronic	B-Device
Reservisor	I-Device
,	O
Teleregister	O
produced	O
a	O
number	O
of	O
different	O
versions	O
for	O
a	O
variety	O
of	O
customers	O
.	O
</s>
<s>
A	O
number	O
of	O
customers	O
bought	O
Magnetronic	B-Device
Reservisor	I-Device
systems	O
,	O
including	O
Braniff	O
International	O
Airways	O
,	O
National	O
Airlines	O
,	O
Atchison	O
,	O
Topeka	O
&	O
Santa	O
Fe	O
Railroad	O
and	O
New	O
Haven	O
Railroad	O
.	O
</s>
<s>
The	O
Magnetronic	B-Device
Reservisor	I-Device
largely	O
solved	O
the	O
booking	O
and	O
availability	O
problems	O
,	O
but	O
this	O
left	O
the	O
issue	O
of	O
recording	O
passenger	O
information	O
after	O
the	O
sale	O
was	O
made	O
.	O
</s>
<s>
Working	O
with	O
IBM	O
,	O
Amman	O
built	O
the	O
Reserwriter	O
,	O
which	O
allowed	O
operators	O
to	O
type	O
passenger	O
information	O
onto	O
a	O
punched	B-Architecture
card	I-Architecture
for	O
storage	O
.	O
</s>
<s>
The	O
tapes	O
could	O
then	O
be	O
forwarded	O
for	O
processing	O
at	O
remote	O
sites	O
,	O
including	O
the	O
Magnetronic	B-Device
Reservisor	I-Device
in	O
New	O
York	O
,	O
allowing	O
remote	O
offices	O
to	O
directly	O
book	O
and	O
cancel	O
flights	O
while	O
recording	O
passenger	O
information	O
at	O
the	O
same	O
time	O
.	O
</s>
<s>
In	O
spite	O
of	O
the	O
successes	O
with	O
the	O
Reservisor	B-Device
and	O
Reserwriter	O
,	O
the	O
system	O
as	O
a	O
whole	O
was	O
highly	O
dependent	O
on	O
manual	O
input	O
.	O
</s>
<s>
arranged	O
for	O
Smith	O
to	O
visit	O
the	O
Magnetronic	B-Device
Reservisor	I-Device
office	O
and	O
suggest	O
ways	O
that	O
IBM	O
might	O
be	O
able	O
to	O
improve	O
the	O
system	O
.	O
</s>
<s>
IBM	O
was	O
at	O
that	O
time	O
starting	O
work	O
on	O
the	O
Semi-Automatic	B-Device
Ground	I-Device
Environment	I-Device
(	O
SAGE	O
)	O
system	O
for	O
the	O
United	O
States	O
Air	O
Force	O
,	O
which	O
had	O
a	O
large	O
number	O
of	O
features	O
in	O
common	O
with	O
a	O
booking	O
system	O
;	O
remote	O
communications	O
with	O
"	O
offices	O
"	O
,	O
real-time	O
updating	O
,	O
interactive	O
user	O
terminals	O
,	O
and	O
storage	O
of	O
large	O
amounts	O
of	O
information	O
.	O
</s>
<s>
Development	O
of	O
the	O
Sabre	B-Application
system	O
started	O
,	O
which	O
many	O
computer	O
historians	O
have	O
suggested	O
was	O
one	O
of	O
the	O
major	O
milestones	O
in	O
the	O
commercialization	O
of	O
computers	O
.	O
</s>
<s>
SABRE	B-Application
was	O
not	O
,	O
however	O
,	O
the	O
first	O
computerized	O
booking	O
system	O
;	O
that	O
honor	O
goes	O
to	O
the	O
little-known	O
Trans-Canada	O
Air	O
Lines	O
(	O
today	O
's	O
Air	O
Canada	O
)	O
system	O
,	O
ReserVec	B-Device
.	O
</s>
