It's bad enough we need passwords for everyday life on computers at home, but when we need multiple passwords at work as well, it begins to border on the ridiculous.  Adding to that, we have to change our passwords every 45 days.  And, we can't make subtle changes to them.  No.  A computer tracks what passwords we use and if it's too close to one we've used in the past 6 months, it won't allow it.  I have six passwords all due to expire within the next five days.  Lots and lots of fun.  NOT!