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Head title 1


Today's   increasing
abundance   of  dif-
ferent types of com-
puter   terminals(1)
bodes  well  for the
satisfaction of  the
diverse   needs  and
desires of  computer
terminal   users.(2)
__________

(1)See attached
list.

(2)Footnote...

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Head title 2


Before any new  ter-
minal  can  be  con-
nected to a computer
system,  however, an
appropriate   inter-
face   must   exist.
This      interface,
inevitably involving
both system hardware
and  software,  must
cope    with     the
terminal's    speed,
character set,  line
discipline,  special
features,  lack   of

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Head title 3


features,  and other
idiosyncrasies.(3)
In  many  cases, the
physical association
of such an interface
__________

(3)See
reference   (3)
for   a    more
complete
description  of
terminal
differences.


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Head title 4


with a  terminal  is
dynamic;        most
general-purpose
time-sharing systems
are   accessed   via
switched   telephone
lines.      Although
dedicating   certain
access lines to each
terminal type is the
simplest   approach,
economy     dictates
that as many  termi-
nal  types as possi-
ble  be  served   by

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Head title 5


each  group of dedi-
cated  lines.    The
greatest economy oc-
curs when all termi-
nals   can  use  the
same group of lines.
If  different termi-
nal types are to use
the    same   access
lines, it is  neces-
sary  for the system
to be able to  iden-
tify   the  terminal
type.   This   paper
addresses        the

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Head title 6


terminal-type  iden-
tification problem.
TERMINAL  PROPERTIES
While   it   is  the
differences  between
types   that  brings
about the  need  for
identification,   it
is    often    these
differences     that
permit   identifica-
tion.   The  proper-
ties  and  abilities
of  terminals may be
classified and exam-

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Head title 7


ined  for  their ef-
fect on the necessi-
ty  for and the pos-
sibility of type in-
dentification.   The
concern here is with
typewriter-like ter-
minals     employing
asynchronous charac-
ter  communications.
The first properties
to be enumerated are
fundamental ones; i.
e,  properties  that
cannot   be  ignored

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Head title 8


when   communicating
with  the  terminal.
Character  code  and
format.  In addition
to the  character  -
bit-pattern    rela-
tionship,       this
includes(end)

extra line






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Head title 9


another extra line.















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