thanks chris. maybe i have the right quote to that: "humans are good in making things complicated." (brian foote).

concerning mathematica: 1992 the demographic people were still dreaming of having such a tool. a paper of sw/ un poco hw development. i tend to say: from the perspective of spreadsheets. fees of the time included as also the line: "strategies for the future". nice lit.list.

"an enormous body of evermore impressive hardware and software attracts a vast number of intended users who, in developed countries, often can afford the dollar cost of the new hardware and software much more readily than they can find the time to learn to use it effectively."