avp on Nostr: Why "Receive" and "Transmit" sometimes are shortened to "Rx" and "Tx" respectively? ...

Why "Receive" and "Transmit" sometimes are shortened to "Rx" and "Tx" respectively? Here's the answer:
https://english.stackexchange.com/questions/377483/why-is-x-used-as-an-abbreviation-for-nouns-like-tx-for-transmit