Tomlinson was working on improving Tomlinson worked on making computers better.., true ✅, false ❌, At first, scientists could send messages to distant computers., ✅true , false ❌, The @ sign helped send emails to other computers., true ✅, false ❌, What symbol did Tomlinson use to send messages to other computers?, #, !, @, $, How many email users were there by the end of the 20th century?, A) 50 million, B) 100 million, C) 263 million, D) 4 billion, What allows people to stay in constant touch over long distances today?, A) Only computers, B) Email and text messaging, C) Letters, D) Fax machines.

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