3270-type

Runtime mapping uses attribute bytes to establish individual fields on the screen. Fields are displayed on the screen with the attributes available on the terminal. Attributes such as color and underscoring are not available on a 3270-type terminal.

3279-type

Runtime mapping uses attribute bytes to establish fields on the screen. Fields are displayed on the screen with the attributes available on the terminal. Display attributes such as color and underscoring are available on 3279-type terminals.

Glass TTY-type

The screen is processed as a single wraparound data line; however, runtime mapping displays data so that it appears to the operator that fields are posted to the map as on 3270-type terminals. Fields are displayed according to the screen's default display options; most 3270- and 3279-type display attributes are unavailable.