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Programmed Data Processor - 1
Maintenance Manual

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Programmed Data Processor-5 instruction manual

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The PDP-4 was 18-bit machine intended to be a slower, cheaper alternative to the PDP-1; it was not considered commercially successful. All later 18-bit PDP machines (7, 9 and 15) were based on a similar, but enlarged instruction set, more powerful,…

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Programmed Data Processor-1 instruction handbook.

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Programmed Data Processor-4 instruction booklet.

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This many paged ledger has but one page of entries, shown. Its not clear what group of employees earnings are recorded. Note on bottom right the page was audited by Geo. R. Lawton.