👉 In computer science, "unhailable" is a concept that refers to a resource that cannot be accessed by another process until it has been handed over to another process. This can occur in a distributed system where multiple processes need access to a shared resource. For example, if a file server needs to send out a list of files to all the clients, but only one client wants to download them at a time, the server cannot do so because it would have to wait for each download request before
