  The first papers on o-minimal structures appeared in the mid 1980s, since
then the subject has grown into a wide ranging generalisation of semialgebraic,
subanalytic and subpfaffian geometry. In these notes we try to show that this
is in fact the case by presenting several examples of o-minimal structures and
by listing some geometric properties of sets and maps definable in o-minimal
structures. We omit here any reference to the pure model theory of o-minimal
structures and to the theory of groups and rings definable in o-minimal
structures.
