Alphabetical order had to be invented to help people organize the first dictionaries. On the other hand, we may have reached a point where alphabetical order has gone obsolete. Wikipedia is ostensibly in alphabetical order, but, when you think about it, it's not in any order at all. You use a search engine to get into it.
Memes can be visual. Our image of George Washington is a meme. We don't actually have any idea what George Washington looked like. There are so many different portraits of him, and they're all different. But we have an image in our head, and that image is propagated from one place to another, from one person to another.
The body itself is an information processor. Memory resides not just in brains but in every cell. No wonder genetics bloomed along with information theory. DNA is the quintessential information molecule, the most advanced message processor at the cellular level - an alphabet and a code, 6 billion bits to form a human being.
With the advent of computing, human invention crossed a threshold into a world different from everything that came before. The computer is the universal machine almost by definition, machine-of-all-trades, capable of accomplishing or simulating just about any task that can be logically defined.
In the 1920s, a generation before the coming of solid-state electronics, one could look at the circuits and see how the electron stream flowed. Radios had valves, as though electricity were a fluid to be diverted by plumbing. With the click of the knob came a significant hiss and hum, just at the edge of audibility.
You know, entropy is associated thermodynamically, in systems involving heat, with disorder. And in an analogous way, information is associated with disorder, which seems paradoxical. But when you think about it, a bit of information is a surprise. If you already knew what the message contained, there would be no new information in it.