[dredmorbius]

Some I remember generally. A very few I recall directly ("Duty Calls" is 386, as in the Intle chip.)

"Money" made an impression at the time. I DDG'd "xkcd money" to pull the URL.

Other times I just suspect that there's a relevant xkcd and try some keywords.

[CRConrad]

"Duty calls" as in "Someone is wrong on the Internet!", I'm fairly sure. Hey, it's that new hot processor, so a fairly memorable number. "Little Bobby Tables" is 327 IIRC; also the CI capacity of an old American V8 engine (a Ford, I think).