Final answer:
Herbert Hoover was the first president to have a telephone on his Oval Office desk, marking the integration of advanced communication technology into the highest level of government.
Step-by-step explanation:
The first president to have a telephone on his Oval Office desk was Herbert Hoover. The telephone, first patented by Alexander Graham Bell in 1876, revolutionized communication and quickly became a staple in homes and offices across the country. By 1900, the proliferation of the telephone network enabled more than 1.5 million phones to be in use in the United States, paving the way for this technology to reach the highest levels of government. President Hoover, serving from 1929 to 1933, was the first to have a telephone installed at his desk in the Oval Office, signaling a new era of communication technologies used by presidents.