see 7uu_fig2

    <<<<<< SOME CLEANING SUBROUTINE >>>>>>

DRAWFILE

                Invitation

     Dear Colleagues, There will be a

     celebration for the announcement of the                   

     new product.  Meeting time, 12:10 PM, on        

     the front lawn, next to the assembly plant.

   <<<<< TERMINAL SCREEN DRAWING SUBROUTINE >>>>>>>>

UTERMINAL

                    TERMINAL                  

NEXT

 $V1$

     <<<<<< TIME POSE SUBROUTINE >>>>>>>>>

PAUSE

If they want to quit, do so

    <<<<<< 4 BOTTOM LINES CLEANING SUBROUTINE >>>>>>

ENCORE5

    <<<<<< REVIEW CLEANING SUBROUTINE >>>>>>

ENCORE

    <<<<<< CLEAN THE INSIDE OF BOUNDED ARE ONLY >>>>>

BOX

                       ILLUSTRATION                     

**********FOOTER TO REQUEST CONTINUATION**********

  This is an insert in the 843.7 course which will provide some drills

  in what the UNIX file id crap is like

 Below is a subroutine to clear out the dialogue area of our screen.

LOOP1

 Below is a subroutine to paint over the contents of our terminal

 screen and put a $ in the appropriate place.

LOOP2

$PROMPT$ 

 This is the routine that draws the terminal

  This is the routine that draws the file of reverse video which

  we will pipe into, etc.

AANVANG

    You can redirect the standard input.

    By redirecting the input, you are  

    telling the Shell that instead of reading

    the data from your keyboard, it should

    read it from the specified input file!

    The symbol used for input redirection is:

                       < 

To use a file as input for a command,

all you do is tell UNIX

command

^

|

|

The command

you want

<

^

|

|

The < symbol

for redirection

filename

^

|

|

The name of the

file you want the

output to go into

for example

V

|

|

|

:

-

-

>

mail

V

|

:

-

-

-

:

V

<

V

|

:

-

-

-

-

-

-

-

-

V

invitation

 Let us practice using the  <  facility by sending the contents 

 of the file invitation to all office personnel.

 Please enter the command to mail to office the

 file invitation.

 $PROMPT$

 That is correct!

 You've got it on the 2nd try.

 Good, you understand the concept.

 Please type mail office with input from invitation

 Please type mail office < invitation

 You will be helped this time.

 $PROMPT$

FORGET1

 mail office < invitation          

DRAWRED1

 Observe the result below the terminal.

 $PROMPT$