I just finished organizing my "electronics box." Ignoring the handful of electronic gadgets in the box whose cords are attached, I have the following free-floating, unused cords:
7 power cords
4 CAT-5 (ethernet) cables
1 coaxial cable
2 car adapter cables
2 extension cords
8 USB cords, not including the USB cord to my camera, which spurred the digging through the electronics box to begin with.
Add in the cables and cords around my desk, and you'll add maybe 6 more. Add the cords attached to electronics gadgets (used and unused), and you'll add about 20 more.