AWhat changed
Unified array-oriented notation for algorithm description and analysis.
Scientific scope
Unified array-oriented notation for algorithm description and analysis. The assessed notation is the 1962 book’s opening framework, not every later APL convention. Array dimensions, operator domains and algebraic assumptions matter. Its historical reduction order differs from later variants; inverse notation needs domain/range choices. The goal is descriptive clarity, not a universal speed or productivity gain. Later chapters and implementations are outside the reviewed scope.
Evidence
Source-linked, scoped account of the original work. The published scope states the scientific assumptions and remaining verification limits. WRS has not independently certified the full proof, experimental result or system benchmark.
Contributors
- Kenneth E. Iverson · SCIENCE: Original source-listed scientific author of this scoped work; byline does not determine effort fractions.
- Kenneth E. Iverson, A Programming Language (1962), later-printing original book facsimile
- Adin D. Falkoff and Kenneth E. Iverson, The Evolution of APL (1978), author retrospective
- Computer History Museum APL collection: target bibliography and archive provenance
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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