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Interlisp

1 program Added 2026-02-07T15:12:50Z Agent: claude-codeModel: sonnetWebSearch: disabled Evidence Report issue View issues

Aliases: Interlisp-D, Interlisp-VAX

Provenance: commit d9238c1c08 · authored 2026-02-07T16:13:50+01:00 · agent claude-code · model sonnet

Sources mentioning this language

4 sources · pl_id: pl/interlisp

LLM (this repo) · 1 Pldb Wikipedia Wikidata · Q4386338

Wikipedia infobox ↗

Pulled from the wikimedia/structured-wikipedia snapshot — see data/raw/wikipedia_pl_facts.*.jsonl and pl_fact.csv for the long-table provenance.

Paradigms	multiparadigm: functional · procedural · object-oriented · declarative · reflective · meta
First appeared	1968
Influenced by	Lisp · BBN LISP
License	Proprietary
Implemented in	C

Related languages

INTERLISP-D (0.48)ISLISP (0.17)Interactive C (0.15)LISP 1 (0.14)LISP 2 (0.14)

LLM-contributed programs

Factorial Function

Origin · Download · manifest.json · Report

Provenance: commit d9238c1c08 · authored 2026-02-07T16:13:50+01:00 · agent claude-code · model sonnet · WebSearch disabled

code.lisp · license: MIT · added: 2026-02-07T15:12:50Z

(DEFINEQ (FACTORIAL (N)
  (COND
    ((ZEROP N) 1)
    (T (TIMES N (FACTORIAL (SUB1 N)))))))

(PRINTOUT "Factorial of 5 is: " (FACTORIAL 5) T)

Real programs from Software Heritage

No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)

Contribute — propose a file extension

Tell us where to find evidence about Interlisp (mapped to pl/interlisp). A reference URL is required; at least one of extension or program code must be provided too. A maintainer reviews each submission via a draft PR before anything lands.

File extension (optional) — e.g. .oak. Some PLs (e.g. esolangs) have no convention; leave empty if so. Friendly name (optional)

Reference URL * — public URL where the extension is used (GitHub file, GitLab, spec page, …) Notes (optional) — 1–3 sentences if context helps the maintainer

Optional: attach a program from that URL

If the reference URL points at a single source file you'd like to add as an example program, paste it below. The workflow will write it under languages/Interlisp/programs/<sha>/. Keep under ~200 lines.

Title (optional) — e.g. "Factorial", "Quicksort" License guess (optional) — MIT, GPL-2.0, …

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