Commands - IBM System 360 User Manual

The blank space produced when you hit the space bar is also
considered to be a character, and you can delete it using the
character-deletion or line-deletion characters. For example, if you
type the following line:
a blcd liE IIf
it is received by the system as:
CD EF
After you type a line and make any necessary corrections, you can
enter that line as follows:
• Press the RETURN key on an IBM 2741 Communications Terminal.
• Press the RETURN key on an IBM 1052 Printer-Keyboard (If the 1052
does not have the automatic EOB feature, hold down the ALTN coding
key and press the EOB(s)
key.)~
• Hold the CTRL key and press the XOFF key on a Teletype 2 terminal.
Notes:
• All examples in this manual assume that you are using an IBM 2741
communications terminal, and that you must press the RETURN key to
enter a
line.~
• If you want to enter a null line, that is a line with no characters
in it, press the key used to enter a line (RETURN key on the 2741).
You cannot use the character-deletion and line-deletion characters to
make corrections to the line after you enter it. If the line you
entered was a command, you must use the attention interruption
(described later in ~his section) to cancel the command, and then you
must reenter the command. If the line you entered was data, you can
change it by using the EDIT command (described in the section, "Entering
and Manipulating Data").
Normally.. you will use the default characters in the system, (usually
the backspace and the attention key). However,. you can use the PROFILE
command to establish your own character-deletion and line-deletion
characters. The PROFILE command is described in the section, "Starting
and Ending a Terminal Session". The ability to change the
character-deletion and line-deletion characters is particularly useful
when you use more than one type of terminal. For example, any time you
have to use a terminal that does not have backspace and attention keys,
you can use the PROFILE command to select two other suitable characters
as the character-deletion and line-deletion characters.
Commands
You can communicate with the system by typing requests for work,
commands, at the terminal. Different commands specify different kinds
of work. You can store data in the system, change the data, and
retrieve it at your convenience. You can create programs, test them,
execute them and obtain the results at your terminal. The commands make
the facilities of the system available at your terminal.
~For
information about the terminal you are using, refer to TSO
Terminals.
2
Trademark of the Teletype Corporation .•
12 TSO Terminal User's Guide (Release 21)