The “Glass Teletype”

From TOG on Interface by Bruce “TOG” Tognazzini, pg. 131:

Early computers used printers as their sole output. When programmers at various large traditional computer companies were first given monitors, they immediately duplicated the printer interface on their green, glowing screens, giving rise to the term “glass Teletype.” With this lavish investment of more than 20 minutes of design time behind them, they saw no need to update the interface for the next thirty years.