Update

internet.md

@@ -82,6 +82,7 @@ Internet overtook the world thanks to having enabled great number of services to
 - **phone networks, [phreaking](phreaking.md), power line communication etc.**: phone networks (and possibly other networks like the electric network, TV network etc.) can be used for all kinds of communication, with [modems](modem.md) they can interconnect digital computers (which was widely used before Internet became widespread, see e.g. [BBS](bbs.md) networks); these networks can also be [hacked](hacking.md) to be used for free or cheap communication -- old time hackers knew how to rape phone boots to let them make free calls (see [phreaking](phreaking.md)). Networks primarily used for carrying power can also carry information alongside power (see [power line communication](plc.md)). Nowadays more anti hacking measures are in place but you may still e.g. exploit the fact that merely ringing someone's phone is completely free, which can be used to send a few [bits](bit.md) of information. WARNING: It's generally illegal to mess with these networks in unintended ways, trying this shit's always on you :-) Also touching random electric cables can kill you. If you by accident take down some optical cable or something, you'll be fined to death.
 - **normal voice communication**: As stupid as it sounds, we can sometimes just talk to other people, even if they live in another village, simply by going there and talking to them. You can use shouting to reach even people who are far away instantly -- some communities even invented things like [whistling languages](whistling_language.md) to communicate simple messages on extreme distances, this was used by hunters in forests etc. We got too much used to using cell phones to communicate with someone who just happens to be in another room, but this is just stupid, this can be just discarded as human degeneracy.
 - **petroglyphs ([rock](rock.md) carving), wood carving, glass painting, knot tying, metal tables etc.**: Data can be recorded manually in many materials, e.g. Incas used Quipu, a special knot tying language. Carving to stone is hard but will last for a long time, it is ideal for preserving small amounts of important information for a long time. See also [rock carved binary data](rcbd.md).
+- **[circuit switching](circuit_sqitching.md)**: Network technology based on establishing direct connections between nodes that want to communicate -- this predate [packet switching](packet_switching.md) used by the Internet, i.e. it might be called more primitive and easier to implement.
 - **human memory**: Human memory can be used instead of computer memory, though we have to bear in mind its limitations. In very old times, before books became common and cheap, there existed people who made living by memorizing history in forms of long poems and recited them in public (this is how e.g. Iliad and Odyssey survived until they were actually recorded).
 - **public fora**: Instead of an Internet discussion forum or chat it's possible to just allocate some public space for people to simply talk. Instead of [YouTube](youtube.md) videos people can go see someone's lecture, with the advantage of being able to actually talk to the guy and ask questions -- again, pretty obvious but the new generation may already be forgetting things can be [done simply](kiss.md).
 - **local storage/paper and offline programs instead of [cloud](cloud.md)**: This is again more of a note for the newer generation that's used to storing everything in the cloud and also using "cloud apps" -- you can (and SHOULD) store things locally of course, you can use offline programs and eve boomer solutions like a literal paper notebook for taking notes instead of using some online note taking "app". Similarly you can store your cash [money](money.md) and private photos in a physical safe instead of relying on Internet banking or password protected clouds and voila, suddenly you free of yet another bullshit.