1) The word "triangle" contains four vowels: I, A, E, and E.

2) Ryan Reynolds is a Canadian actor, producer, and entrepreneur known for his roles in films such as "Deadpool," "The Proposal," and "Detective Pikachu." He has gained recognition for his comedic timing and charismatic performances on-screen.

3) The world's first credit card was introduced in 1950 by Diners Club.

4) The first commercially successful video game was "Pong," released in 1972 by Atari.