Sort-of memes that are cracking you up at the moment

Incorrect. Star Wars: a New Hope = 1977, Empire Strikes Back = 1980, Return of the Jedi = 1983. Photoshop (originally Display) = 1987, for showing grey on b+w screens IIRC. I think ILM were involved but I can't remember how and I'd rather be outside in the sun than google it :)
(Rowhan is also incorrect in his Photoshop 1.0 assertion for reasons too mundane to go into)

John Knoll was working at ILM while he and his brother developed it, but I don't think ILM were otherwise involved.

Photoshop's lens flare was originally written by Knoll for 1991's Hook.