Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Slowly, functionality went even further, and users could play games like chess with others across the ARPANET.
Source: https://www.denver7.com/how-was-the-internet-created