I would like to know if the correct/official spelling of the ‘Internet’ - in English - is with or without capital ‘I’? AFAIK there’s still only one Internet, and I think it should be with ‘I’, but I can’t find any definite answer. It’s a bit of a pet peeve for me in Danish, because I know for certain that it is ‘Internet’, but in English… (I know there might be differences between UK and US English).
From dictionary.com
The GPO Style Manual – one of the best – says Internet is capitalized.
AFAIK, that’s the standard, since there is only one Internet. Once Internet2 somes along, things may change.
The Associated Press capitalizes Internet as well. Interestingly (to me, at least) e-mail is lowercased (and hyphenated), and Web site is capitalized as written.
Yes.
As previously mentioned, a small-i internet is any grouping of computer networks conencted together. Networks may only be connected together as separate entities, rather than merged into one entity, because of different network technologies, addressing schemes, ownerships, security requirements, needs for trafflic flow regulation, etc.
The Internet, with a capital I, is that well-known internet through which we are discussing this subject.
Thanks very much 
Clearly, I must have dropped my brain somewhere without noticing or lost my ability to read, because Dictionary.com was one of the first places I checked :smack:
The rationale behind “Web site” is probably that it is shorthand for “a site on the World Wide Web.” Since “e” is for “electronic,” I think it makes more sense for it to be lowercased.
Here is a post that has another cite from a technical book bolstering the dictionary definition given above. The thread is only tangentially related to the spelling issue so I just linked the one post.
http://boards.straightdope.com/sdmb/showpost.php?p=6656745&postcount=27
Now I’m getting curious. Does the term ‘intranet’ hold any meaning to you? Since that is what I would call a local network; say the local network of a firm. Or would that be ‘an internet’?
An intranet is a network entirely within an organization. Often it is only accessible to members of the organization as well.
It always struck me as being more of a high-level marketing term than a precise low-level technical term, because there is nothing preventing an organization’s intranet from being an internet as well, depending on how its components are configured.
Where I work, the term “intranet” is usually contrasted with the worldwide Internet, in a way that speaks more of high-level permissions rather than the technical construction of the infrastructure.
If it were up to me, I would capitalise it along the models of U-turn, T-shirt, I-beam, A-line, D-list, etc.
C-rations, D-day, F-stop, J-school …
“F-stop” is not capitalized. “C-ration” may be capitalized, but is lowercase on dictionary.com. “D-day” refers to a specific day, so properly ought to be capitalized. “J-School” I can go either way on.
In the examples in your previous post, the letters refer to the shapes (U-turn, T-shirt, etc.), or to the letter itself (D-list), and thus are properly capitalized.
I feel “e-mail” should be lowercase to follow examples like “f-stop” and “c-ration.” Heck, I’m actually all for “email” as a single word. It irked me at first, but now after seeing it everywhere and using it, I like it.