My engineering dictionary is a little out of date, and I've been doing a lot of editing in civil engineering recently. So I asked my client which engineering dictionary they preferred, and they recommended this one. It is clearly laid out, has helpful diagrams and will be a useful guide to preferred spellings.
If you write or edit maths using LaTeX, you probably need to use the amsmath package. This guide is an invaluable resource.
This, I understand, is the top style guide for publishing in the United States, so naturally, if you're editing for the American market, you need to have it. It turns out to be very sensible, with many explanations, and it is well laid out, with many examples and illustrations. It is also quite comprehensive, and seems to have everything covered. This makes it useful for anybody who has anything to write, as well as editors, proofreaders and publishers.
The copy I have is from 1978 (was my husband's at uni), but it never seems to age. I use it to check points of physical chemistry, of course, and I also find the impeccable typesetting of maths a very useful guide in editing.
(If I remember correctly, it was this book that we put under the children's Moses basket mattress if we wanted to raise their heads for easier breathing when they had a cold.)
Yet another author specified the APA style, so I figured it would be easier to get the manual than fossick around on the internet. The book is entitled Publication Manual of the American Psychological Association and is in its sixth edition.
It is much slimmer than the AMA manual, isn't as helpful as you might expect, and has some very surprising inconsistencies and omissions. I think this is because it really is aimed at academic research papers in psychology; it was never meant to be used in any kind of book for any kind of audience. If I were you, I'd only follow it if my journal publisher specified.
A journal I was editing for specified that abbreviations listed in the AMA Manual of Style were acceptable, so I figured I'd better buy me a copy. It has lots of useful advice on many technical subjects related to health and medicine, and I am wondering why I didn't buy it before. It also offers helpful tips on US style English, and appears to be well written, with helpful examples and interesting quotations.
I don't know what the CAB stands for, but this is a searchable list of suitable words for use in the keywords section of your research paper. It seems quite nifty.
Some people write US states completely; many publishers want the standard two letter abbreviations. It is a good idea to have a list where you can find it quickly. Luckily, this is often an appendix in a reference book or dictionary. I have one helpfully provided in my most-used style guide.
When editing maths textbooks, you might want to check the maths. This is no longer tedious and time-consuming, because there are websites that will do the maths for you. This website is good at matrices.
When editing maths textbooks, you might want to check the maths. This is no longer tedious and time-consuming, because there are websites that will do the maths for you. I have found a very good calculator that can do differentiation; it can even take you through all the steps.
Anneka Sanders said it would be helpful if I could put details of useful references on my facebook page. So I do, but I think it might be easier if I archive them here.