The Longman Dictionary of Contemporary English throws these acceptions, among others, for the noun CONTENT. Could somebody explain to me the difference in meaning between Ab and B and why one is un plural and the other in singular?
A) contents [plural]
a) the things that are inside a box, bag, room etc
contents of
The customs official rummaged through the contents of his briefcase.
Most of the gallery's contents were damaged in the fire.
b) the things that are written in a letter, book etc
contents of
She kept the contents of the letter a secret.
The program automatically creates a
table of contents (=a list at the beginning of a document that shows the different parts into which it is divided).
B) [singular, uncountable] the ideas, facts, or opinions that are contained in a speech, piece of writing, film, programme etc:
The content of the media course includes scripting, editing and camera work.
C) [singular, uncountable] the information contained in a website, considered separately from the software that makes the website work:
The graphics are brilliant. It's just a shame the content is so poor.