I am aware that numbered lists are allowable as long as double spacing is used between each item and that identation is not allowed. I'm however not clear on how to format the steps of my "how to" article:
1.One
(a) something
(b) something else
2. Two
3. Three
I have appropriately double-spaced the 1,2 and 3 and they are not indented. What spacing should I have for a and b? Should a and b be indented given that they are under 1?
Another question: In my article, I have sentences like 'Press Ctrl+Alt+Del to shut down your computer'. Will this be deemed an error of some sort maybe because of using '+' or because Ctrl, Alt and Del are not English words?
Regarding acronyms: I'm writing an article regarding web design, its intended audience being folks with basic knowledge on the internet and web design. Should I explain the meaning of terms like HTML or CSS which I've used in my article? I read a reply to an earlier query regarding acronyms saying "acronyms that you feel are common enough don't need to be defined". But what I feel to be 'common enough' (being a web designer) may not be common to other guys, most importantly the guy reviewing my article.

Please help me out? I'd like to get it right the first time.