The following diagram depicts ____ logic.

Concept: In digital electronics, a logic family is classified by identifying which component performs the logic-gating function and which component performs the amplifying/switching function. Diode-Transistor Logic (DTL) is the family in which a diode network gates the inputs and a transistor amplifies/switches the output — this split is the defining rule for naming a logic family from its circuit diagram.

Application: In the given circuit, inputs A and B each pass through an input diode into a common node that is tied through a pull-up resistor to +V and connected to the base of an NPN transistor; the transistor's collector is pulled up to +V through another resistor and gives the output Y, with its emitter grounded. The diode pair performs the input logic-gating, while the transistor performs the amplifying/switching that produces Y = NOT(A AND B).

• Diode alone would mean only the passive input-gating diodes are present, with no active amplifying/switching stage — but the diagram clearly shows an active transistor driving the output.

• Transistor alone would mean the circuit switches directly on the raw inputs with no separate diode network gating them first — but the diagram shows two input diodes feeding the transistor's base.

• Resistor alone would describe only the passive pull-up/bias elements at the collector and diode nodes, which set current levels but perform no logic-gating or switching function themselves.

• Diode-transistor accounts for every active/gating element in the diagram together: the input diode network for gating and the transistor stage for switching.

Result: Because the circuit combines an input diode-gating network with a transistor amplifying/switching stage, the diagram depicts Diode-Transistor Logic (DTL).