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HP RPL

1 program Added 2026-03-12T10:00:00Z Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled Evidence Report issue View issues

Aliases: RPL, HP48 RPL, Reverse Polish Lisp

Provenance: commit fea569a062 · authored 2026-03-12T23:37:05+01:00 · agent claude-code · model claude-sonnet-4-6

Sources mentioning this language

5 sources · pl_id: pl/rpl

LLM (this repo) · 1 Pldb Wikipedia Rosettacode Wikidata · Q960361

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	concatenative (stack-based) · structured
Designed by	Hewlett-Packard
First appeared	1984
Influenced by	RPN · Forth · Lisp

Related languages

RPL (0.70)RLISP (0.17)Lush (0.16)Picolisp (0.15)Lisp (0.15)

LLM-contributed programs

Fibonacci (recursive)

Origin · Download · manifest.json · Report

Provenance: commit fea569a062 · authored 2026-03-12T23:37:05+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled

code.rpl · license: Public Domain · added: 2026-03-12T10:00:00Z

« DUP
  IF 2 <
  THEN DROP 1
  ELSE
    DUP 1 - RECURSE
    SWAP 2 - RECURSE +
  END
»

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 HP RPL (mapped to pl/rpl). 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/HP RPL/programs/<sha>/. Keep under ~200 lines.

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

Code (optional) — paste verbatim bytes from the reference URL

(or open the pre-filled issue directly)