What is the full form of ARPANET?

CONCEPT

An acronym is expanded by matching each letter to the exact words in the official name. Historical names must preserve their documented wording, including singular or plural forms.

For a full-form question, compare every word in each proposed expansion with the established name rather than relying only on the initials.

APPLICATION

Match each letter to the corresponding word in the documented expansion:

CONTRAST

• Advancement of Research Projects Agency Network begins with the noun “Advancement” rather than the documented adjective.

• Add on Research Projects Agency Network begins with the two-word phrase “Add on” rather than the documented adjective.

• American Research Projects Agency Network begins with a nationality adjective rather than the documented adjective.

CROSS-CHECK

Historical U.S. government records identify ARPA as the Advanced Research Projects Agency, the agency that sponsored ARPANET; the final word “Network” accounts for N.

RESULT

Therefore, ARPANET stands for Advanced Research Projects Agency Network.