We’ve recently discovered a very useful – and somewhat addictive – website, Common errors in English. Although it’s not directly about engineering, the site could be helpful in writing papers, developing presentations, or writing cover letters. It’s full of advice about grammar and spelling quandaries you might find familiar: should you use “an” for a word, like Xray, that starts with a vowel sound, but isn’t a vowel? Should you use affect or effect? E.g. or i.e?
You might even come across a mistake you didn’t realize you had been making – I didn’t know “please RSVP” was redundant.