Blizzards and a GPS: can I use my GPS to find my driveway in a blizzard? How about to stay on the road?
Cable modem address: Can the cable-modem address be changed?
Computer Chips: is the latest chip really only three atoms thick?
Computer disks:  Why does placing magnets near computer hard drives damage them?
Digitizing movie films: How are old movie films converted to a digital recording?
Digitizing vinyl records: How are old vinyl records converted to a digital recording?
Digitizing vinyl records:  I have several old records made by my dad from about 1940 to 1949. Some are small, recorded on only one side, and others larger, recorded on both sides. Maybe 78s?  How can I play these and put them on a CD?
EMI: On many electrical cables, particularly those for computers, there is a cylindrical chunk of ferrite material slipped over the end adjacent to the plug. I understand these things somehow filter out undesirable electrical interference but, how do they work?
Fiber optics v. wireless access: Which connection is faster: fiber optic cable or wireless access?
Internet phones:  Can Internet phones call non-Internet phones? If so, how do they do it?
Pager signals:  do weather conditions affect the signal for pagers?
Radar ghosts: During the Korean War, we picked up a contact on our surface radar at about 15 miles. The target plotted a collision course and plotted right through our ship without visual contact. The contact was truly a ghost. How does this happen?
Radar:  I wonder what viewing device, in theory, would have high enough resolution to detect the movement of nitrogen and oxygen molecules? Could radar be used or would it take higher frequencies, like X-rays?
Radio reception: Why does my car radio pick up a remote station much better than the radios inside my house?