The famed Grand Central Terminal in New York City is home to ... Also living beneath the tracks is one of the first electronic computers dating back to 1913. Produced by Justin Gmoser.

Passive devices Capacitor The capacitor is a passive electronic component with two terminals. Its function is to store electrical energy in an electric field and deliver it to the circuit when needed.

Some of these devices simply combined a printing electronic calculator with a cash drawer. More elaborate registers not only tracked accumulated receipts, like a traditional cash register, but handled ...