Printer and Terminal I/O

@( ): Returns an escape sequence used for terminal control.
BREAK: Enables or disables the Break key on the keyboard.
CLEARDATA: Clears all data previously stored by the DATA statement.
CRC32: Outputs data to the screen.
DATA: Stores values to be used in subsequent requests for data input.
DISPLAY: Outputs data to the screen.
ECHO: Controls the display of input characters on the terminal screen.
FOOTING: Specifies text to be printed at the bottom of each page.
HEADING: Specifies text to be printed at the top of each page.
HUSH: Suppresses all text normally sent to a terminal during processing.
INPUT: Allows data input from the keyboard during program execution.
INPUT @: Positions the cursor at a specified location and defines the length of the input field.
INPUTCLEAR: Clears the type-ahead buffer.
INPUTDISP @: Positions the cursor at a specified location and defines a format for the variable to print.
INPUTERR: Prints a formatted error message from the ERRMSG file on the bottom line of the terminal.
INPUTNULL: Defines a single character to be recognized as the empty string in an INPUT @ statement.
INPUTTRAP: Branches to a program label or subroutine on a TRAP key.
KEYEDIT: Assigns specific editing functions to the keys on the keyboard to be used with the INPUT statement.
KEYEXIT: Specifies exit traps for the keys assigned editing functions by the KEYEDIT statement.
KEYIN( ): Reads a single character from the input buffer and returns it.
KEYTRAP: Specifies traps for the keys assigned specific functions by the KEYEDIT statement.
OPENDEV: Opens a device for input or output.
PAGE: Prints a footing at the bottom of the page, advances to the next page, and prints a heading at the top.
PRINT: Outputs data to the terminal screen or to a printer.
PRINTER CLOSE: Indicates the completion of a print file and readiness for the data stored in the system buffer to be printed on the line printer.
PRINTER ON | OFF: Indicates whether print file 0 is to output to the terminal screen or to the line printer.
PRINTER RESET
PRITNERR: Prints a formatted error message from the ERRMSG file on the bottom line of the terminal.
PROMPT: Defines the prompt character for user input.
TABSTOP: Sets the current tabstop width for PRINT statements.
TERMINFO( ): Accesses the information contained in the terminfo files.
TPARM( ): Evaluates a parameterized terminfo string.
TPRINT: Sends data with delays to the screen, a line printer, or another specified print file (that is, a logical printer).