Back in the early-nineties, I signed up for AOL dial-up service and wanted a "screen name" for instant messaging that didn't include numbers at the end. Having an extremely common name (James Brown) made is very difficult to come up with a name that included my name. I also wanted something short, without very many characters. ibjhb was the result and since I hate coming up with new names, it has always stuck.
You don't. Just say each letter.
I started using them in elementary school but really started learning in the early-nineties. I started earning money "working" with computers in the late-nineties for fixing personal computers and building websites.
Since Allaire Version 4.0 (I still have the CD-ROM), which was around 1998.
Ask me on the contact form.