Bill Gates blogged about the 50th anniversary of Microsoft's first product, the Altair BASIC interpreter, and the blog post included a link to a scanned PDF of a printout of the source code.
@pronoiac ran OCRmyPDF against the original document. This is a slightly better optimized copy of that PDF; it includes (not great) text from OCR, and jbig2 lossless compression. It's a bit smaller - 84 MB, compared to the original's 95 MB.
If you'd rather skim the badly-OCR'ed text, see the ocr/ folder in the repo. It's under 1 MB.
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pronoiac