- 1 CNC
- 2 Academia
- 3 References
- 4 Journals
- 5 CAD
- 6 Digital Fabrication
- 7 Machining
- 8 Casting
- 9 Woodworking
- 10 Materials
- 11 CNC Joinery
- 12 Motion
- 13 Design
- 14 Graphics
- 15 Signs and letter-forms
- 16 Programming
- 17 Leatherworking
- 18 Sources and Repositories
Make: Getting Started with CNC By Edward Ford
The definitive introduction to working with affordable desktop and benchtop CNCs.
The CNC Cookbook: An Introduction to the Creation and Operation of Computer Controlled Mills, Router Tables, Lathes, and More
This is a really good introduction to CNC. It's well written and understandable. It will help you understand some of the vocabulary and gives a good introduction to CNC.
A tutorial sample is available on the website Feeds and Speeds Tutorial for CNC.
Hobbyist CNC Machining --- Wikibook (nascent)
CNC router evaluation procedures by Edward L. Adams
G codes for the specification of Pythagorean-hodograph tool paths --- Academic paper discussing how curves, arcs and circles are handled and the consequences of representing them as polygons or polylines.
Curve fitting with arc splines for NC toolpath generation --- Yeung, Millan K; Walton, Desmond J, Computer Aided Design. Vol. 26, no. 11, pp. 845-849. 1994
CNC Handbook --- HSMWorks (Solidworks) on-line help file covering CNC basics
Setup Reduction Through Effective Workholding by Edward G Hoffman
Low-Cost Micromachining Development and Application for Engineering and Technology Education --- Paper on the development of a micro-machining tool with a 2" x 2" x 2" work area
CNC Programming Handbook by Peter Smid
Japanese gitbook: https://www.gitbook.com/book/fablabsendai/how-to-use-shapeoko/details
https://a-e-mag.com/ --- Awards & Engraving industry magazine --- mostly focused on laser engraving, but covers other topics.
http://www.cadhistory.net/ originally published as The Engineering Design Revolution https://www.goodreads.com/book/show/17203585-the-engineering-design-revolution-cad-history
makers by Chris Anderson --- discusses “the next manufacturing revolution as home fabrication and talks about desktop CNC machines, 3D printers, &c.”
Fab: The Coming Revolution on Your Desktop--from Personal Computers to Personal Fabrication by Neil Gershenfeld --- examines history of the implications of affordable fabrication, including the origin of pyCAM.
Can Emerging Technologies Make a Difference in Development? By Rachel A. Parker (Editor), Richard P. Appelbaum (Editor)
American Machinists’ Handbook and Dictionary of Shop Terms: A Reference Book of Machine Shop and Drawing Room Data, Methods and Definitions by Fred H. Colvin and Frank A. Stanley Second Edition (last version which has entered the public domain and become freely distributable) https://www.reddit.com/r/CNC/comments/43qbv1/best_edition_of_machinerys_handbook/ --- not the Industrial Press’s Machinery’s Handbook now in the 29th edition, see below.
Machinery’s Handbook 30th edition --- a 2896 page book full of useful information from Trigonometry to Speeds and Feeds and much more. Earlier editions can be picked up used on eBay for reasonable prices.
1st edition reprint: https://www.anvilfire.com/bookrev/ind_pres/index1st.php When measured one copy was 183mm x 127mm x 55mm
Modern Machine Shop's Handbook for the Metalworking Industries by Woodrow W. Chapman --- often suggested as a suitable up-date for the 21st century shop.
Text-book of advanced machine work --- Written by an M.I.T. professor at the turn of the previous century. Includes many tips on machining.
Setup Reduction Through Effective Workholding by Edward G Hoffman
A number of U.S. Army manuals on metal-working have been written, and since published by the U.S. Government are in the public domain. One place which they are available at is opensourcemachine.org:
- Band Saw Operations
- Fundamentals of Machine Tools
- Principles of Drafting and Shop Drawing
- Lathe Operations
- Metal Properties, Characteristics, Uses and Codes
- Milling Machine Operations
- Machine Shop Calculation
- Welding Operations
Mechanical Practice by United States. Radio matériel school, Washington, D.C. United States. Bureau of Naval Personnel.
Metal Cutting Theory and Practice (Manufacturing Engineering and Materials Processing) 2nd Edition by David A. Stephenson (Author), John S. Agapiou (Author)
Home Machinist's Handbook by Doug Briney
Metal Lathe for Home Machinists by Harold Hall
Metalworking: Doing it Better and Metalworking Sink or Swim by Tom Lipton
Machine Shop Trade Secrets by James A. Harvey
Jigs and Fixtures: a reference book showing many types of jigs by Colvin and Haas 
Interesting Reddit thread about melting 6061 aluminum cans, dross and other issues: https://www.reddit.com/r/Machinists/comments/3606n6/anyone_know_what_type_of_aluminum_soda_cans_are/cra2a3n
(Please see Wood under Materials below)
(Please also see the section below on CNC Joinery)
Similarly, the U.S. Forestry Service has many publications on wood. One especially useful example is, Wood Handbook: Wood as an Engineering Material (Centennial Edition).
UK take on it here:http://www.laver.co.uk/content/timber-pdf-downloads (Timber%20properties.pdf seems to no longer be available)
Understanding Wood: A Craftsman's Guide to Wood Technology by R. Bruce Hoadley 
Laser-Beam Interactions with Materials by Martin von Allman 
digital joints --- booklet describing joints cut using a CNC and their usage.
That is also linked at: Fabrication Techniques & Hardware: Joinery, q.v.
Collection of .pdfs: http://www.derekhugger.com/tools.html
Precision Machine Design illustrated edition by Alexander H. Slocum
http://char.txa.cornell.edu/ Art, Design, and Visual Thinking
The Nature and Art of Workmanship by David Pye
- http://www.adobe.com/products/postscript/pdfs/PLRM.pdf --- the "Red Book" http://paulbourke.net/dataformats/postscript/ 
- http://www-cdf.fnal.gov/offline/PostScript/GREENBK.PDF --- Glenn Reid made this freely available, but his site is off-line
- Mathematical Illustrations: A manual of geometry and PostScript by Bill Casselman
Signs and letter-forms
- Creative Lettering Today by Michael Harvey --- Republication of several classic works, Calligraphy in the Graphic Arts, Creative Lettering and Carving Letters in Stone & Wood with additional new information on digital letterforms. The computer information is specific to the Macintosh program FontStudio (no longer available), with occasional references to Fontographer, but includes mentionings of concepts simply not addressed anywhere else.
- Lettercarving in Wood: A Practical Course by Chris Pye
- The leather work book : containing full instructions for making and ornamenting articles so as to successfully imitate carved oak ; specifically written for the use of amateurs by Rosa Baughan
- Leather Work by Adelaide Mickel