net send was the messenger of choice on the St. Petersburg State University campus back in the 00's. People called it “popup” (after the earlier WinPopup utilit

net send was the messenger of choice on the St. Petersburg State University campus back in the 00's. People called it “popup” (after the earlier WinPopup utility perhaps). I remember seeing some announcements (like about lost belongings or something) put up on a (physical!) bulletin board saying “message me on popup: [hostname]”