Read the first chapter of Marr’s Vision (1982), with specific emphasis on section 1.2.
Email Frank your best example of Marr’s levels with the subject “Marr’s Levels Side Quest.” The best example every year will be immortalized in this notebook (until the server dies or something breaks).
| David Marr | Computational | the rule of zero; commutativity; associativity; inverses => theory of addition |
| cash register | Algorithmic | “adding the least significant digits first and “carrying” if the sum exceeds 9” |
| 1982 | Implementation | “wires and transistors” |