---
title: "RPNZL"
id: 13827
type: "product"
slug: "rpnzl"
url: "http://localhost/product/rpnzl/"
markdown_url: "http://localhost/product/rpnzl.md"
published_at: "2019-11-30T01:38:08+00:00"
modified_at: "2026-03-22T13:31:45+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Reverse Polish Notation ZX81 Language is a FORTH-like language. Faster than Sinclair BASIC, support for structured code and faster tape load/save. 16K."
category:
  - name: "Programming"
    slug: "programming"
    taxonomy: "category"
    url: "http://localhost/category/software/programming/"
post_tag:
  - name: "Golden Stair"
    slug: "golden-stair"
    taxonomy: "post_tag"
    url: "http://localhost/tag/golden-stair/"
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
genre:
  - name: "Programming"
    slug: "programming"
    taxonomy: "genre"
    url: "http://localhost/type/programming/"
  - name: "Software"
    slug: "software"
    taxonomy: "genre"
    url: "http://localhost/type/software/"
company:
  id: 10905
  title: "Golden Stair, The"
  type: "company"
  url: "http://localhost/company/golden-stair/"
price: 29.95
date: 1983
rarity: "Uncommon"
related_content:
  - id: 58622
    title: "RPNZL Users Manual"
    type: "document"
    url: "http://localhost/document/rpnzl-users-manual/"
product_reviews:
  - id: 58352
    title: "RPNZL Quartet"
    type: "article"
    url: "http://localhost/article/rpnzl-quartet-2/"
  - id: 58353
    title: "More on Darkening the Printer"
    type: "article"
    url: "http://localhost/article/more-on-darkening-the-printer-2/"
articles:
  - article:
      id: 24490
      title: "Resources (Sync v4 n1)"
      type: "article"
      url: "http://localhost/article/resources-sync-v4-n1/"
adverts:
  - publication:
      - id: 26460
        title: "SYNC v4 n2"
        type: "issue"
        url: "http://localhost/issue/sync-v4-n2/"
    advert_page: "50"
companies_products:
  - id: 10905
    title: "Golden Stair, The"
    type: "company"
    url: "http://localhost/company/golden-stair/"
---

# RPNZL

Reverse Polish Notation ZX81 Language is a FORTH-like language. Faster than Sinclair BASIC, support for structured code and faster tape load/save. 16K.