When Should I Capitalise ‘Internet’?

The question of whether to capitalise ‘internet’ is controversial. It has even inspired its own Wikipedia article. But we’re here to make writing easy, so we’re going to ignore the controversies and set out the basics of when to capitalise ‘internet’.

Internet as a Proper Noun

Unless it appears at the start of a sentence, you should only capitalise ‘Internet’ when it is a noun. More specifically, you can capitalise it when referring to the Internet (i.e. the thing that hosts the World Wide Web).

Thus, ‘Internet’ is a proper noun, a word that names a unique thing. So ‘the Internet’ is like the name of a person (e.g. Delia) or city (e.g. Norwich).

Using a capital ‘I’ was common in the early days of the Web, especially in technical writing. However, as the internet has become part of our lives, most people now write it with a lower-case ‘i’ instead.

Dialect can make a difference, too, as capitalising ‘Internet’ is more common in American English than British English. Ultimately, though, it is a matter preference. For instance, both of these sentences are fine:

The most important thing is consistency. So if you write ‘Internet’ in one part of a document, you should use the same capitalisation throughout. You may also want to check your university/employer’s style guide.

However, there are a couple of situations where you should never capitalise this term. We will look at each of the following below:

• Using ‘internet’ to refer to interconnected networks in general.
• Using ‘internet’ as an adjective.

Internet as a Common Noun

The word ‘internet’ is a contraction of ‘interconnected network’. We can therefore use it to describe any set of interconnecting networks. And when referring to interconnected networks in general, we do not capitalise ‘internet’ because it is a common noun rather than a proper noun.

In other words, while the Internet is an internet, it is not the only possible internet! If you are involved with computers in your work or studies, then, you would not capitalise ‘internet’ if you were using it in this generic sense.

However, in day-to-day life, ‘internet’ almost always refers to the internet.

Adjectival Internets

We can also use ‘internet’ like an adjective. For example:

Here, the word ‘internet’ modifies the noun ‘connection’. This means we’ve used it like an adjective (something known as a noun adjunct). Typically, when ‘internet’ is used as a modifier like this, you do not need to capitalise it.

Summary: When Should I Capitalise Internet?

You can capitalise the ‘i’ in ‘internet’ if you are using it as a proper noun, but this is a matter of choice. At Proofed, for example, we prefer ‘internet’. But this is just because we don’t see the need to capitalise it, not because ‘Internet’ is wrong.

There are no hard and fast rules about capitalising ‘internet’, then. However, if you want to capitalise it, keep the following in mind:

• You can capitalise ‘Internet’ when it refers to the infrastructure that hosts the World Wide Web, but this is a matter of choice.
• Do not capitalise ‘internet’ when using it as a noun adjunct to modify another noun (e.g. ‘internet users’ or ‘internet browser’).
• Do not capitalise this term when referring to internetworking in general.
• If you are writing for your studies or job, you may have a style guide available. Check this for advice on capitalisation.
• Make sure to apply capitalisation consistently in your writing.

And if you’d like more help with your writing, you can have it proofread.