We do our best to obtain freely available usable source material. Some may only be available as scans of older manuals or photocopies. This will be shown in the manual sample of the product page. Please ensure you are happy with the quality before purchase.

Material is distributed under the terms of the GNU Public License, the GNU Lesser General Public License (LGPL), or as Freeware, with free/open distribution licenses.

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We provide the manuals that are available today, some vary in quality, which is why we always show example pages from the manuals which shows diagrams, pictures and text.

Please ensure you are happy with this example before purchase, as once downloaded orders cannot be refunded.