On-line and downloadable documents and software

• Trends in Computer Technology (E.H. Dooijes, rev. 2006)
• Preface to Rothenberg, Technological Quicksand (E.H. Dooijes)
• Old Computers, Now and in the Future (E. H. Dooijes)
• An Olivetti Programma 101 emulator
• Instruction Reference Cards for various machines
• ELIZA, your personal psychiatrist
• lineprinter graphics
• Hobbyscoop Basicode FSK signal decoder (E.H. Dooijes, 2009)

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Tens-carry mechanism design for Babbage's Analytical Engine, ˜1836