My prefix can be seen in "three things that think"
My infix is used for vowels
And my suffix can be seen in a computer
I can wipeout half of the universe, Who am I?
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The fictional character
Thanos, whose ambition in the Infinity Wars movie was to wipe out half the universe’s life, with the goal of environmental sustainability.
th(ree) th(ings) th(at) th(ink)
‘an’ used instead of ‘a’, before words starting with a vowel sound
OS (a computer’s Operating System)