$1!Os!0$!G+ (B/s - $1!bb!C!!8?(B,s 1955-; $1!Ct!12!42s (Toffler, Alvin) ($1!58!4I!<D (B:s $1!Q<!I&!Bs!8D!Na(B,s, 1981)
$1!YF!T& (B: The third wave.s