---
title: "10 Programs for the ZX81"
id: 11501
type: "product"
slug: "10-programs-for-the-zx81"
url: "http://localhost/product/10-programs-for-the-zx81/"
markdown_url: "http://localhost/product/10-programs-for-the-zx81.md"
published_at: "2019-11-30T01:31:20+00:00"
modified_at: "2026-03-22T19:46:44+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "Examples of input/output and instructions. 6 on statistics: student, paired observations, correlation, linear regression, analysis of variance, and chi squared. 4 on fish hatchery management: 2 on fish food order and daily feed programs (one for rainbow trout; one for cutthroat trout), fish hatchery records; flow and density index calculations."
category:
  - name: "Math/Science"
    slug: "math-science"
    taxonomy: "category"
    url: "http://localhost/category/software/math-science/"
post_tag:
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Verlin K. Cross (company)"
    slug: "verlin-k-cross"
    taxonomy: "post_tag"
    url: "http://localhost/tag/verlin-k-cross/"
model:
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
genre:
  - name: "Mathematics"
    slug: "mathematics"
    taxonomy: "genre"
    url: "http://localhost/type/mathematics/"
  - name: "Software"
    slug: "software"
    taxonomy: "genre"
    url: "http://localhost/type/software/"
company:
  id: 11430
  title: "Verlin K. Cross"
  type: "company"
  url: "http://localhost/company/verlin-k-cross/"
price: 5
date: 1983
rarity: "Uncommon"
articles:
  - article:
      id: 24413
      title: "Using Your Computer: Programs"
      type: "article"
      url: "http://localhost/article/using-your-computer-programs/"
companies_products:
  - id: 11430
    title: "Verlin K. Cross"
    type: "company"
    url: "http://localhost/company/verlin-k-cross/"
---

Examples of input/output and instructions. 6 on statistics: student, paired observations, correlation, linear regression, analysis of variance, and chi squared. 4 on fish hatchery management: 2 on fish food order and daily feed programs (one for rainbow trout; one for cutthroat trout), fish hatchery records; flow and density index calculations.