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The Authoritative Website for Timex/Sinclair Computers

The Authoritative Website for Timex/Sinclair Computers

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Home » Donald H. Marks

Search
Computers
Downloadable Software
- ZX81/TS-1000
- TS-2068
Publications
Companies
- Sinclair
- Timex
- View All
Products
Community
About
Blog

Donald H. Marks

Articles

Graphing Data, Part I: Quadra Chart and Graph-It
Graphing Data, Part II: Program Listing
War in the East — Game Review

Recent Posts

T/S Horizons in Cash From Your ComputerJanuary 4, 2026
Timex Sinclair 2068 TimelineDecember 7, 2025
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Timex/Sinclair 2068: A Computer in Search of an AudienceNovember 10, 2025
The Man Who Tried to Save TimexNovember 6, 2025

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