Clippy
The paperclip therapist you never asked for. Popped up, judged your grammar, and haunted your dreams.

Quick Bits
What It Was
Clippy was Microsoft's animated Office Assistant, designed to make software feel friendly by popping up with context-sensitive help. In theory it was charming. In practice it had the timing of a heckler.
Why It Mattered
Clippy became one of the most famous UI experiments of the desktop era because it showed how hard it is to make software feel helpful instead of deeply condescending. Product teams are still learning that lesson the hard way.
Why It Endured in Memory
People found it disruptive, which is exactly why it became the mascot for software showing up uninvited.
But Clippy outlived plenty of better products because it had personality, a face, and the kind of weird fake-human energy bland help menus could never touch.