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the (50), #bitsavers (44), for (35), org (32), and (18), are (17), #archive (15), https (12), edge (11), trailing (10), rsync (10), rss (9), http (9), with (9), that (9), pdf (8), com (8), ftpmirror (8), scanning (8), www (7), your (7), from (7), xml (6), has (6), web (6), files (6), have (6), been (6), simh (6), scan (6), ftp (5), this (5), was (5), there (5), which (5), documents (5), using (5), over (5), pages (5), informatik (4), uni (4), stuttgart (4), pub (4), you (4), netbsd (4), document (4), snapshot (4), format (4), compression (4), post (4), were (4), processing (4), page (4), years (4), use (4), since (4), now (4), where (4), bits (3), magazines (3), university (3), misc (3), site (3), any (3), these (3), acrobat (3), computer (3), processed (3), conversion (3), done (3), tiff (3), ocr (3), text (3), collection (3), many (3), will (3), chm (3), material (3), paper (3), feeds (2), updates (2), communications (2), components (2), computerhistory (2), mirrorservice (2), sites (2), kent (2), bighole (2), mirror (2), decromancer (2), eldanna (2), ocaml (2), infania (2), net (2), preferred (2), syncing (2), copy (2), can (2), entire (2), delete (2), file (2), index (2), level (2), each (2), time (2), indexed (2), what (2), drives (2), large (2), them (2), pdp (2), 2012 (2), museum (2), scans (2), april (2), here (2), just (2), lossless (2), group (2), fax (2), itu (2), recommendation (2), images (2), scanned (2), duplex (2), scanner (2), through (2), 2007 (2), kodak (2), 2500d (2), panasonic (2), color (2), formats (2), than (2), tumble (2), much (2), resolution (2), dpi (2), process (2), pictures (2), either (2), separate (2), workflow (2), started (2), rooms (2), longer (2), they (2), still (2), sata (2), very (2), don (2), something (2), donated (2), project (2), looks (2), mirrors (2), anonymous (2), 2026 (2), available, comms, comp, mags, test_equipment, oldbytes, space, deck, social, media, presence, everything, method, cloning, javascript, data, bases, stuff, designed, cloned, exact, clone, big, bump, size, because, preservation, iso, archival, releases, warned, names, dates, their, location, hierarchy, change, why, needed, maintained, top, category, heirarchy, indexbydate, txt, updated, added, some, directories, numbers, ocred, embedded, adobe, disappointed, how, poorly, modern, goes, jul, 2004, jan, 2005, com_201206, jun, com_semi, dec, semiconductor, specifications, edu, queensland, release, present, mailing_lists, cctalk_mailing_list, cctalk, back, 1997, kept, minimal, subset, container, contributions, normally, tools, put, exactly, ricoh, is520, 400dpi, 30ppm, production, late, higher, performance, occured, july, oem, version, s2055, 2008, replaced, s3065w, capable, 600dpi, capability, sheets, 100, inches, long, lemkesoft, mostly, clean, edges, eric, smith, enhanced, support, other, final, step, pro, continued, faster, tif, form, contributed, saved, minium, 400, cost, storage, declined, moved, 600, all, bitonal, 2010s, lower, resolutions, produce, noticable, artifacts, needs, straightened, lossy, such, jpeg, should, never, used, save, destroys, contrast, part, slowly, being, applied, older, slow, take, complete, generally, 300dpi, jpegs, inserted, appropriate, grayscale, 2020s, fully, jpeg2000, viewscan, fujitsu, 5530c2, taken, exist, 2006, demolished, when, revolution, exhibit, built, roughly, gift, shop, orientation, theatre, see, four, xserve, raids, 2021, 1tb, toshiba, pata, adapters, most, personal, bought, given, course, decades, industry, loaned, backlog, actively, solicit, work, decide, donor, return, requested, unless, rare, probably, won, accept, requires, manual, day, limited, not, personally, destructive, bindings, removed, recycled, original, good, condition, may, history, archiving, depending, within, collecting, scope, running, lot, number, downsize, early, continues, its, primary, purpose, way, reason, leave, static, easy, remind, like, 1995, dot, x6512, does, source, come, tape, station, graphic, converter, snapshots, indexing, aren, permalinks, active, mastodon, rsyncing, willing, offer, service, please, let, know, email, address, bottom, add, url, list, people, downloading, interface, situation, gotten, worse, llm, scrapers, appeared, supporting, patreon, 188000, including, million, 86tb, due, traffic, wget, permitted, test, equipment, magazine, computing, software, main,

Text of the page (random words):
the bitsavers main page bitsavers org bitsavers software archive computing archive communications archive components archive magazine archive test equipment archive 2026 05 10 as of april 2026 due to the level of web traffic wget is no longer permitted here there are over 188000 files including over 8 86 million text pages in the 1 86tb archive there is a patreon now for supporting the bitsavers project people are downloading the entire site through the web interface the situation has gotten much worse since the llm web scrapers have appeared use anonymous rsync that s what it s there for if you re rsyncing and are willing to offer anonymous rsync service please let me know at the at the email address at the bottom of this page and i will add your url to the list bitsavers updates rss rss feeds for bitsavers updates are available https bitsavers org rss bits xml for bits https bitsavers org rss comms xml for communications https bitsavers org rss comp xml for components https bitsavers org rss mags xml for magazines http bitsavers org rss pdf xml for pdf http bitsavers org rss te xml for test_equipment mastodon http oldbytes space deck bitsavers for bitsavers social media presence active mirrors web http bitsavers computerhistory org for bitsavers computerhistory org http bitsavers informatik uni stuttgart de for bitsavers informatik uni stuttgart de http bitsavers trailing edge com for bitsavers trailing edge com http www mirrorservice org sites www bitsavers org for university of kent http ftpmirror your org pub misc bitsavers for ftpmirror your org http www bighole nl pub mirror www bitsavers org for www bighole nl https archive decromancer ca bitsavers org for decromancer ca ftp ftp bitsavers informatik uni stuttgart de for bitsavers informatik uni stuttgart de ftp ftp mirrorservice org sites www bitsavers org for university of kent ftp ftpmirror your org pub misc bitsavers for ftpmirror your org rsync rsync eldanna ocaml nl bitsavers for eldanna ocaml nl rsync ftpmirror your org everything pub misc bitsavers for ftpmirror your org rsync ftpmirror infania net bitsavers for ftpmirror infania net rsync is the preferred method for cloning and syncing with the archive this site has no javascript data bases or any of that web 2 0 stuff it was designed to be cloned as is to be an exact copy of bitsavers org you can clone the entire archive with rsync av delete rsync bitsavers org bitsavers bitsavers there was a big bump in archive size because of the preservation of netbsd iso archival releases if you are syncing be warned that file names dates and their location in the hierarchy change these aren t permalinks which is why delete is needed with rsync archive indexing an index file is maintained at the top level of each category heirarchy indexbydate txt is updated each time an indexed document is added to the archive these files are what drives the rss feeds some directories with large numbers of ocred pdf files have embedded adobe acrobat index files in them i have been disappointed in how poorly bitsavers in indexed in the modern web so it goes snapshots mirrors https bitsavers org pdp 11 trailing edge com jul 2004 snapshot of pdp 11 trailing edge com https bitsavers org simh trailing edge com jan 2005 snapshot of simh trailing edge com https bitsavers org simh trailing edge com_201206 jun 2012 snapshot of simh trailing edge com https bitsavers org simh trailing edge com_semi snapshot of dec semiconductor specifications from simh trailing edge com https bitsavers org www computer museum uq edu au for scans from the university of queensland https bitsavers org bits netbsd netbsd org netbsd release archive 1 0 to the present https bitsavers org mailing_lists cctalk_mailing_list is a copy of cctalk back to april 1997 the pdf document format documents here are kept in a minimal subset of pdf format just using it as a container for lossless group 4 fax compression itu t recommendation t 6 images contributions are normally post processed by tools to put them in exactly this format documents were scanned using a ricoh is520 400dpi 30ppm b w duplex production scanner from the late 90 s through 2007 conversion to higher performance kodak ds 2500d scanning occured in july 2007 the 2500d is an oem version of the panasonic kv s2055 scanner in 2008 the kodak was replaced by a panasonic kv s3065w which is capable of duplex color 600dpi scanning and has the capability to scan sheets 100 inches long post processing is done using lemkesoft s graphic converter mostly just to clean page edges tiff to pdf conversion is done using eric smith s tumble which has been enhanced over the years to support formats other than tiff a final ocr step is done with acrobat pro i ve continued to use tumble since it is much faster than acrobat for tif to pdf conversion the preferred form for any contributed text scan is as a collection of lossless group 4 fax compression itu t recommendation t 6 images saved as tiff files with a minium scan resolution of 400 dpi as the cost of storage declined i moved to 600 dpi for all of my bitonal scanning in the 2010s lower scan resolutions produce noticable artifacts if a page needs to be straightened in post processing lossy compression formats such as jpeg should never be used to save pages of text since the compression format destroys edge resolution and contrast ocr ocr has been part of the post processing of scans for many years now and is slowly being applied to older pdf files it is a slow process and it will take many years to complete pictures and magazines pages with pictures are processed generally as 300dpi jpegs and are inserted where appropriate either in color or grayscale there is a separate workflow now for magazines which started in the 2020s where the pages are fully processed as jpeg2000 pages with a separate workflow using viewscan and a fujitsu fi 5530c2 document scanning station tape processing over the years these were taken in rooms that no longer exist at chm ca 2006 the rooms were demolished when the revolution exhibit was built they were roughly where the gift shop and orientation theatre are now you can see four xserve raids which are still in use in 2021 with 2 5 1tb toshiba sata drives and pata sata adapters where does the source material come from most of the documents are from my personal collection that i have either bought or been given over the course of many decades in the computer industry or have been loaned to me for scanning i have a very large backlog of material to scan and don t actively solicit material to work on if i do decide to scan something from a donor i will return it if requested unless it is a very rare document i probably won t accept something that requires manual scanning since scanning time in my day is limited i do not personally archive any paper that has been scanned the scanning process i use is destructive bindings are removed and paper is recycled original documents that are still in good condition may be donated to the computer history museum for archiving depending on if they are within chm s collecting scope the chm running lot number for my donated documents is x6512 2012 this project was started to downsize my collection of paper in the early 90 s and continues to be its primary purpose and the site looks this way for a reason to leave it static and easy to mirror so don t remind me that it looks like it s from 1995 at bitsavers dot org