---
title: "QL Hacker’s Journal 4"
id: 61540
type: "issue"
slug: "ql-hackers-journal-4"
url: "http://localhost/issue/ql-hackers-journal-4/"
markdown_url: "http://localhost/issue/ql-hackers-journal-4.md"
published_at: "2025-11-18T13:05:09+00:00"
modified_at: "2025-11-20T00:04:54+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2025/10/Sinclair_QL_Top_cutout-scaled.png"
category:
  - name: "QL Hacker's Journal"
    slug: "ql-hackers-journal"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/ql-hackers-journal/"
periodical_issues:
  - id: 33686
    title: "QL Hacker’s Journal"
    type: "periodical"
    url: "http://localhost/periodical/ql-hackers-journal/"
number: "4"
issue_date: "July 1991"
issues_articles:
  - id: 61583
    title: "Editor’s Forum"
    type: "article"
    url: "http://localhost/article/editors-forum-5/"
  - id: 61584
    title: "Rand_c"
    type: "article"
    url: "http://localhost/article/rand_c/"
  - id: 61585
    title: "Cellular Automata"
    type: "article"
    url: "http://localhost/article/cellular-automata/"
  - id: 61586
    title: "Iterated Function Systems"
    type: "article"
    url: "http://localhost/article/iterated-function-systems/"
archiveurl: "https://archive.org/download/ql-hackers-journal/QL%20Hacker%27s%20Journal%204.txt"
---

# QL Hacker’s Journal 4