> The command line, network protocols, etc. There are not the realm of fancy dynamic length characters. So how does one write, say, the backend for a reservati

> The command line, network protocols, etc. There are not the realm of fancy dynamic length characters. So how does one write, say, the backend for a reservation system managing thousands of hotel room bookings every hour, all over the world? I'm pretty sure there will be ALOT of customers with non-ascii names, not to mention adresses and hotel names. How does one write a system like twitter, where messages in every known system of writing need to be be sent, processed, stored, delivered, commented, displayed? And btw. network protocols and backends work with arbitrary data all the time: Audio & video streaming, networked gaming, sensor readouts, images. Even plaintext webpages are often transmitted in compressed form. So if these systems are the "realm" of arbitrary bytestreams to encode everything from classical music, over sha-hashes, to gifs of dancing dogs, they may as well encode a few hundred different systems of writing and some smiley faces.