This is a high speed comms solution that makes optical fibre look like two bean cans and a bit of string. I call this the electron pipe. I invented it in 1990, but it remains in the future since we can’t do it yet. The idea is to use an evacuated tube and send a beam of high energy particles down it instead of crude floods of electrons down a wire or photons in fibres. Initially I though of using 1MeV electrons, then considered that larger particles such as neutrons might be useful too, though they would be harder to control. The wavelength of 1MeV electrons would be pretty small, allowing very high frequency signals and data rates, many times what is possible with visible photons down fibres. Would it work? Maybe, especially on short distances via carbon nanotubes for chip interconnect.