Just as a virus that affects humans can mutate and confound medical experts, each version of Sasser -- labeled A, B, C, and D -- poses slightly different challenges for information technology experts.

CNN: Sasser worm rips through Internet

In a world where change is the only constant, a Plan B -- and C, D, and E -- is truly critical.

CNN: Work skills you'll need to survive the 'conceptual age'

And she is reading the - an alphabet that was especially arranged so that the first letter she says - it doesn't go A, B, C, D, E.

NPR: A Beautiful Movie: 'The Diving Bell and the Butterfly'

The men - who were released from custody on 22 October and sent back to their barracks - will be known throughout their court martial as Marines A, B, C, D and E.

BBC: Five marines charged with murder get anonymity

Five companies including HP ultimately got to the point of making offers, but only HP is publicly named in the filing -- the other suitors are referred to as Companies A, B, C, and D.

ENGADGET: HP bought Palm after a five-company bidding war

My buddy Will and I kept a list of the celebrities we'd seen and took great pleasure in our fleeting little encounters with B- and C-list actors.

CNN: Redford and me: Confessions of a Sundance stargazer

Qualities of an excellent mentor include (a) the ability to be patient, (b) be non-judgment, (c) possess wisdom to know when to speak, (d) be willing to work with others that are perhaps different from yourself, and (e ) sometimes go beyond your comfort zone.

FORBES: Service Learning and Mentoring Makes America Stronger