> Many early modems were acoustic couplers attached to telephone handsets using Velcro — one part was a microphone, the other a speaker. You connected by dialling the phone...
    > 
    > Tools like the Unix-to-Unix Copy Program (UUCP) used scripts that called cu or similar tools to establish connections, then transferred data...
    > 
    > UUCP was how we sent mail, read network news, and received (small) files. For much of the research community, it effectively was the network...
    >
    > Sockets changed all this.
    > 
    > Source: https://blog.apnic.net/2026/07/28/hooray-for-the-sockets-interface