The Virtual AGC project would not have been possible without the
archive of AGC-related scanned documents formerly maintained at the
Apollo Guidance Computer website of MIT's Dibner Institute for the
History of Science and Technology (HRST). Unfortunately, the
Dibner Institute has apparently closed, and their AGC website has
disappeared. More accurately, the website has been "archived"
at Caltech; the "archive" has been marked "under construction" for a
long time, and you can only get to it by googling the contents, so I
don't know if it's intended to be publically accessible or not.
meantime, the AGC document scans will be hosted here at Virtual
AGC. The original HRST website contained a number of interesting
things besides the scans, but for now I'm reluctant to host them here
since I'm not sure of the copyright status. I have chosen not to
include any material here that I suspect may have copyrighted problems;
if I'm wrong, let me know!
The original HRST website was maintained by Alexander "Sandy" Brown,
and his contribution should be observed.
The scans presented here at Virtual AGC have in some cases been
improved from their presentation at the original HRST site. For
example, you may find that some documents have added bookmark panels,
have added previously-missing pages, have replacements for some
previously-garbled pages, or even have been completely improved
scans. Improvements are especially plain in the core documents
relevant to Virtual AGC. Some of the documents suffer from the
way in which optical character recognition (OCR) was performed, so if
you have improved scanned images for any of these docs, please send
them to me!
Note that the original HRST site contained credits for some of the
scanned documents. In other words, you could see who provided the
source material or scans. I no longer have access to those
credits, and so haven't included them here, except in the rare cases
where I know who provided the source material or scans. If you
wish to be credited for any of the material, please email me with your
Any file whose size is not explicitly marked is 2.5 Mbytes or less.
Anonymous, Colossus Assemble
Revision 249. In place of the original 82M PDF provided by
MIT HRST, we choose to provide individual PDFs for each page of the
page images have been greatly
improved from the original HRST version by replacement of over 50
The origin of the original scan at HRST is unknown, but
the replacement pages (of which there are many!) were provided by Mr.
Gary Neff. We have also obtained a much-improved scan
from a different copy, thanks to original AGC developer Fred
Anonymous, Luminary 131.
In place of the original 620M PDF provided by MIT HRST, we choose to
provide individual page JPEG images (209M)
which are technically of lower quality, but it's unlikely you could
tell that without a side-by-side comparison. Our scan has been
improved somewhat from the
original HRST version by replacement of a garbled page. The
original scans at HRST, and
the replacement pages presented here, were both originally provided by
Mr. Gary Neff, from a printout preserved by Mr. David Craig, though
unfortunately the online version is of greatly reduced quality from the
scans provided by Mr. Neff (and now lost). (Don't blame me ... it
was before my time.)