Data Retrieval; Data Entry; Inquiry-Response - Tektronix 4023 Instruction Manual

INTRODUCTION
(cont.)
4023
Users
Data Processing
(cont.)
Data
Retrieval
Data Entry
Inquiry-Response
Once
the
system
has
all
the information,
and
the instructions describing
how
to
manipulate the information,
your
assigned task can be performed.
For example, depending on
the
instructions, inquiries, etc.,
that
you type
into
the
computer from
the keyboard, the
computer
will call
from
storage
the particular data required
and
use
it
by
sorting, testing,
and computing
to
arrive at
the
answer
or
information
you
want.
The computer
then transmits
the
results
to the
4023,
where
they
are
displayed
on
the
screen.
The 4023
can display
information
in
response to operator or
program
selection;
however, the Terminal's response
is
not
restricted
to writing
on
the
screen.
It
can
also
perform
a variety
of functions
in
response to "control"
commands.
These functions include (but
are
not limited
to)
controlling the
display
format, switching Terminal operations from one
mode
to another,
ringing
the Terminal's
bell,
and
controlling
outputs
from and
inputs to the
Terminal.
There
are
three
basic
types
of data processing that the
4023
will
perform;
data
retrieval,
data entry,
and
inquiry-response.
As
a
data retrieval device,
you
will
use the
4023
to
obtain information
on
subjects
such
as
bank
balances, credit reports,
inventory
reserves,
or
motor
vehicle
registrations.
Again, the information retrieved
depends on
your company's
business.
Keyboard
entry
is
brief;
usually there
is
just
enough
to identify the data
you
wish
to
retrieve.
Once
the data
is
identified,
the
computer responds with the
specified data.
As
a
data entry
device,
the
4023
is
used
to enter
new
data to the
computer,
or to up-date data previously stored
in
the computer.
The
only
outputs from
the
computer
will
be
operational instructions for you,
or data
entry
forms
to
aid
in
speeding up
data entry.
You
will
find that the excellent
editing capabilities of
the 4023, coupled with the
ability
of the display data
to
be "formatted," greatly simplify the data entry operation.
This
is
a
mode
of operation
in
which
the operator
and computer
carry
on
a
"conversation". Here, the operator uses the
keyboard
to
enter,
to the
computer,
inquiries that are
based
on
previous computer-calculated
results.
The
"conversation" that
results
between
the operator
and
the
computer
is
displayed
on
the screen. Using the
4023
in this
manner
is
helpful to
programmers,
engineers, designers,
and
others
who
create and
use the
computer program
in a
step-by-step fashion.
1-2
®