Retro technology refers to older devices and systems that were once popular but have since been replaced by modern innovations. Examples include items like typewriters, cassette players, and rotary phones. These technologies often evoke nostalgia and are appreciated for their design and simplicity. Many people collect retro technology as a hobby, enjoying the unique aesthetics and functionality of these items. Some retro gadgets, like vintage video game consoles or film cameras, have seen a resurgence in popularity, as enthusiasts seek to experience the charm of past innovations in today's digital world.