timothy from the depreciation-appreciation dept.
Harry writes "When you come across a 1984 Atari Touch Tablet for sale cheap--in the original, unopened box--it would be a crime against computer history not to buy it, open it, install it, and use it, and to document the whole process with photos and commentary."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"