A key technological advancement that occurred during the Second Industrial Revolution was the widespread use of electricity. This period, which spanned from the late 19th to early 20th centuries, saw significant innovations that transformed industries and society. The introduction of electric power enabled mass production, improved transportation systems such as electric streetcars, and allowed for household conveniences like lighting and appliances. The progress in electrical engineering also facilitated advancements in communication, including the telegraph and telephone. Overall, electricity revolutionized industries and daily life, laying the groundwork for modern technological development.