Learn to Make Dollars/Money online: Seth's Blog : Numbers and the human/computer interface

Tuesday, 24 March 2026

Seth's Blog : Numbers and the human/computer interface

Numbers and the human/computer interface

If you tell me your ID number, your phone number or the wiring instructions for your bank account, not only will I forget them, I’ll need you to repeat it a few times so I write it down without making a transcription error.

When we first started using serial numbers (the Roman Legion did this thousands of years ago, and the British Board of Ordnance required it by law in the 1700s), it made perfect sense. Issue the next number on the list and move on.

But numbers alone are difficult for humans to error check and handle. So we use computers to help. The problem lies in the pesky humans who are still part of the chain.

So, here’s a simple hack. It’s unlikely to catch on worldwide, but I think it’s fascinating enough to consider…

If you had a list of 150 three letter words, all selected to be easy to say, spell and discern, you could use them to replace numbers in a productive and useful way.

So, big bob zap car cat is five words next to each other. There are 75 billion combinations of five words, which means that it replaces a number like 4839450381 with room to spare.

For ATMs that are four or five digits, you only need three words.

Think about that the next time you need to tell a customer service person your order number or serial number, or share a wifi password.

Let the computer do the work.