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␈↓ ↓H␈↓␈↓βS␈↓∧ Artificial Intelligence Laboratory, STANFORD UNIVERSITY, Stanford, California 94305
␈↓ ↓H␈↓∧Telephone 415 497-4430␈↓ 	YSeptember 8, 1976




␈↓ ↓H␈↓Professor Edsger W. Dijkstra
␈↓ ↓H␈↓Plataanstraat 5
␈↓ ↓H␈↓NL-4565 NUENEN
␈↓ ↓H␈↓The Netherlands

␈↓ ↓H␈↓Dear Professor Dijkstra:

␈↓ ↓H␈↓        Sorry␈α∪about␈α∪the␈α∪spelling␈α∪errors␈α∪in␈α∪the␈α∪address.␈α∪ Enclosed␈α∪is␈α∪a␈α∪corrected␈α∪copy␈α∪-␈α∪easily
␈↓ ↓H␈↓produced␈αsince␈αthe␈αletter␈αis␈αin␈αthe␈αcomputer,␈αand␈αI␈αwon't␈αask␈αfor␈αtypographical␈αcorrections␈αof␈αyour
␈↓ ↓H␈↓letters.

␈↓ ↓H␈↓        Seriously,␈α∞I␈α∂think␈α∞you␈α∞don't␈α∂allow␈α∞enough␈α∂for␈α∞individual␈α∞variation.␈α∂ Some␈α∞of␈α∂the␈α∞greatest
␈↓ ↓H␈↓writers␈α
revise␈αmany␈α
times,␈α
and␈αothers␈α
hardly␈α
revise␈αat␈α
all.␈α
 Some␈αgood␈α
programmers␈αstructure␈α
their
␈↓ ↓H␈↓programs elegantly, and others patch a lot.


␈↓ ↓H␈↓Best regards,



␈↓ ↓H␈↓John McCarthy
␈↓ ↓H␈↓Director
␈↓ ↓H␈↓Professor of Computer Science