Mine is less interesting, while sitting in my barracks room in mid 90s setting up first email account on my first computer a buddy asked to borrow a wrench. Being an Army mechanic it seemed fitting. So I typed wrench in, it told me it was taken. It offered wrench with different number combinations. None of them had any significance to me, so in an effort to use something I'd remember I used them last four of them phone number I had in my room. Wrench3047 was born and have used it on every internet account since.