Although the field is strengthened to compensate, erasure and writing of the tape is done by the fringing field of the magnetic head, and the magnetization occurs over a length of tape on the same order as the distance between head magnet and the tape. This gives erasures and taped signals...
(See, for example, the Head Start entry. Back in those days, it was possible to believe that a little, or maybe more than a little, benevolent government intervention could make a great society. F. Hayek, in the preface to a later American edition of The Road to Serfdom, comments on ...
Rex head (Albertosaurus head, actually) as logos, so you might expect them to have a good display. I think they do, but it's no longer very evident from their web pages. Now they want your money. I guess they don't want their institution to go down the toilet the way the Madison...