
PREFACE
Electronic communications is exploding today, even though it was only a few
years ago that doomsayers were warning that we were coming to the end of spec-
trum usage, and hence of communications possibilities. But as soon as one service
became saturated, another technology popped up, increasing the number of peo-
ple who could use electronic communications of one sort or another.
An entirely new galaxy of products are on the market today that were either
nonexistent or saw very limited use a few years ago. Many high-school kids and
parents carry beepers (little radio receivers) so that they can keep in touch ...