A seven-segment display is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays.
A typical 7-segment LED display component, with decimal point in a wide DIP-10 package
Filament seven-segment display
A vane display at a gas station
A multiplexed 4-digit, seven-segment display with only 12 pins
A display device is an output device for presentation of information in visual or tactile form. When the input information that is supplied has an electrical signal the display is called an electronic display.
Nixie tubes, LED display and VF display, top to bottom
Display board at Frankfurt (Main) Hauptbahnhof (2005)
Digital clocks display changing numerals