Yep that's the joke ... (such as it is.)
The 'years on the clock' comment was the fact you'd have to remember those 720k / 1.4m floppies (which were actually the primary drives on some early PC's, you'd have two slots, one for the OS and one for working, there wasn't a hard drive period !!)
You know you're getting old when things you remember as being the state of the art become quaint antiquities, or aren't even recognised by today's users.
