What's in a name

In Windows, plain talk makes life easier for users.
Q1: Where are the programs installed?
A1 : In the Program Files folder


Q2: Where are the Operating system Files?
A2: In the Windows folder.

Q3 : How can you monitor the system resources?
A3 : Task manager.

It would seem the most obvious thing to expect and recall.

But, look at the same scenario in Linux.
A1: /usr/ folder. ("come again?")

A2 : I really don't know.

A3 : system guard.

Why would a folder containing the program files be called /usr/? Probably there is a lot of history behind this naming, but is it difficult to start afresh and have a folder/application nomenclature that makes it easier to find stuff in the hard disk? Intuitive seems too ungeeky for Linux heads.