<s>
The	O
IBM	O
1400	O
series	O
were	O
second-generation	O
(	O
transistor	B-Device
)	O
mid-range	O
business	O
decimal	B-Device
computers	I-Device
that	O
IBM	O
marketed	O
in	O
the	O
early	O
1960s	O
.	O
</s>
<s>
The	O
1400-series	O
machines	O
stored	O
information	O
in	O
magnetic	B-General_Concept
cores	I-General_Concept
as	O
variable-length	O
character	O
strings	O
separated	O
on	O
the	O
left	O
by	O
a	O
special	O
bit	O
,	O
called	O
a	O
"	O
wordmark	O
,	O
"	O
and	O
on	O
the	O
right	O
by	O
a	O
"	O
record	O
mark.	O
"	O
</s>
<s>
Input	O
and	O
output	O
support	O
included	O
punched	B-Architecture
card	I-Architecture
,	O
magnetic	O
tape	O
,	O
and	O
high-speed	O
line	O
printers	O
.	O
</s>
<s>
Many	O
members	O
of	O
the	O
series	O
could	O
be	O
used	O
as	O
independent	O
systems	O
,	O
as	O
extensions	O
to	O
IBM	O
punched-card	B-Architecture
equipment	O
,	O
or	O
as	O
auxiliary	O
equipment	O
to	O
other	O
computer	O
systems	O
.	O
</s>
<s>
The	O
1401	B-Device
,	O
announced	O
on	O
October	O
5	O
,	O
1959	O
,	O
was	O
the	O
first	O
member	O
of	O
the	O
IBM	O
1400	O
series	O
.	O
</s>
<s>
The	O
IBM	B-Device
1410	I-Device
was	O
a	O
similar	O
design	O
,	O
but	O
with	O
a	O
larger	O
address	B-General_Concept
space	I-General_Concept
.	O
</s>
<s>
The	O
IBM	B-Device
1460	I-Device
was	O
logically	O
,	O
but	O
not	O
physically	O
,	O
identical	O
to	O
a	O
fully	O
optioned	O
1401	B-Device
with	O
16,000	O
characters	O
of	O
memory	O
,	O
and	O
twice	O
as	O
fast	O
.	O
</s>
<s>
IBM	O
provided	O
several	O
models	O
compatible	O
(	O
or	O
nearly	O
so	O
)	O
with	O
the	O
1401	B-Device
.	O
</s>
<s>
1460	O
was	O
twice	O
as	O
fast	O
,	O
and	O
many	O
special	O
features	O
of	O
1401	B-Device
were	O
standard	O
.	O
</s>
<s>
1440	O
was	O
a	O
popular	O
lower-cost	O
alternative	O
,	O
although	O
not	O
fully	O
compatible	O
with	O
the	O
1401	B-Device
.	O
</s>
<s>
1410	O
was	O
a	O
much	O
faster	O
system	O
in	O
the	O
same	O
spirit	O
as	O
1401	B-Device
,	O
but	O
with	O
significant	O
differences	O
,	O
such	O
as	O
larger	O
memory	O
(	O
up	O
to	O
100,000	O
characters	O
)	O
,	O
more	O
index	O
registers	O
(	O
fifteen	O
)	O
,	O
and	O
additional	O
instructions	O
.	O
</s>
<s>
A	O
remarkable	O
feature	O
in	O
the	O
pre-microprogramming	O
era	O
was	O
a	O
"	O
compatibility	O
mode	O
"	O
switch	O
that	O
allowed	O
it	O
to	O
run	O
1401	B-Device
programs	O
without	O
change	O
.	O
</s>
<s>
The	O
IBM	B-Device
System/360	I-Device
Model	I-Device
30	I-Device
could	O
be	O
ordered	O
with	O
a	O
1401	B-Device
compatibility	O
microprogram	O
feature	O
.	O
</s>
<s>
Several	O
1400	O
series	O
peripherals	O
were	O
adapted	O
for	O
use	O
with	O
System/360	B-Application
.	O
</s>
<s>
Honeywell	O
's	O
Honeywell	B-Device
200	I-Device
provided	O
approximate	O
1401	B-Device
compatibility	O
through	O
a	O
combination	O
of	O
architectural	O
similarity	O
and	O
software	O
support	O
.	O
</s>
<s>
An	O
odd	B-Error_Name
parity	I-Error_Name
bit	O
,	O
called	O
"	O
C	O
"	O
,	O
is	O
also	O
included	O
.	O
</s>
<s>
Programming	O
languages	O
for	O
the	O
1400	O
series	O
included	O
Symbolic	B-Language
Programming	I-Language
System	I-Language
(	O
SPS	O
,	O
an	O
assembly	B-Language
language	I-Language
)	O
,	O
Autocoder	B-Device
(	O
a	O
more	O
fully	O
featured	O
assembly	B-Language
language	I-Language
)	O
,	O
COBOL	B-Application
,	O
FORTRAN	B-Application
,	O
Report	B-Language
Program	I-Language
Generator	I-Language
(	O
RPG	B-Language
)	O
,	O
and	O
FARGO	B-Language
.	O
</s>
<s>
The	O
1400	O
series	O
was	O
replaced	O
by	O
System/360	B-Application
and	O
,	O
later	O
,	O
by	O
low-end	O
machines	O
like	O
the	O
IBM	B-Device
System/3	I-Device
,	O
System/32	B-Device
,	O
System/34	B-Device
,	O
System/36	B-Device
,	O
System/38	B-Device
,	O
and	O
AS/400	B-Device
.	O
</s>
<s>
Two	O
1401	B-Device
computers	O
have	O
been	O
restored	O
to	O
full	O
operational	O
status	O
at	O
the	O
Computer	O
History	O
Museum	O
.	O
</s>
