---
title: "Math Routines and FIT"
id: 13203
type: "product"
slug: "math-routines-and-fit"
url: "http://localhost/product/math-routines-and-fit/"
markdown_url: "http://localhost/product/math-routines-and-fit.md"
published_at: "2019-11-30T01:34:19+00:00"
modified_at: "2026-03-22T19:36:42+00:00"
author: "David Anderson"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "General purpose mathematics program for calculating factorials, permutations, and combinations, for solving quadratic and cubic interpolations, and for plotting fitted curves of 4 different functions. 16K."
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: "ZETA Software"
    slug: "zeta-software"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zeta-software/"
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: 11471
  title: "ZETA Software"
  type: "company"
  url: "http://localhost/company/zeta-software/"
price: 17.95
date: 1983
rarity: "Uncommon"
producturl: "http://www.zx81stuff.org.uk/zx81/tape/MathRoutinesAndFit"
articles:
  - article:
      id: 24413
      title: "Using Your Computer: Programs"
      type: "article"
      url: "http://localhost/article/using-your-computer-programs/"
companies_products:
  - id: 11471
    title: "ZETA Software"
    type: "company"
    url: "http://localhost/company/zeta-software/"
---

# Math Routines and FIT

General purpose mathematics program for calculating factorials, permutations, and combinations, for solving quadratic and cubic interpolations, and for plotting fitted curves of 4 different functions. 16K.