Learn English – Why are some words not capitalized in titles

My reasoning is that there is really only one network named Internet - therefore it's the Internet, while "web" is a more generic term, meaning any network (but probably referring to YouTube anyway ;).

The Guardian style guide says:

capitals

"I am a poet: I distrust anything that starts with a capital letter and ends with a full stop" (Antjie Krog)

Times have changed since the days of medieval manuscripts with elaborate hand-illuminated capital letters, or Victorian documents in which not just proper names, but virtually all nouns, were given initial caps (a Tradition valiantly maintained to this day by Estate Agents).

A look through newspaper archives would show greater use of capitals the further back you went. The tendency towards lowercase, which in part reflects a less formal, less deferential society, has been accelerated by the explosion of the internet: some web companies, and many email users, have dispensed with capitals altogether.

Our style reflects these developments. We aim for coherence and consistency, but not at the expense of clarity. As with any aspect of style, it is impossible to be wholly consistent – there are almost always exceptions, so if you are unsure check for an individual entry in this guide. But here are the main principles:

jobs all lc, eg prime minister, US secretary of state, chief rabbi, editor of the Guardian.

titles cap up titles, but not job description, eg President Barack Obama (but the US president, Barack Obama, and Obama on subsequent mention); the Duke of Westminster (the duke at second mention); Pope Benedict XVI but the pope.

So:

The Dean's Office consists of the Dean, the Vice-Dean of Undergraduate Studies, the Vice-Dean for External Affairs, the Vice-Dean of Graduate Studies and Research, and the Secretary General.

Becomes:

The dean's office consists of the dean, the vice-dean of undergraduate studies, the vice-dean for external affairs, the vice-dean of graduate studies and research, and the secretary general.

Which is also a lot easier on the eye.