I want to install screen, but what should I do next?
$ brew search screen
imgur-screenshot screen screenfetch screenresolution
caskroom/drivers/casio-screen-receiver caskroom/cask/screen-blacker caskroom/cask/show-my-screen caskroom/cask/syphon-virtual-screen
If you meant "screen" specifically:
It was migrated from homebrew/dupes to homebrew/core.