[Tutor] Alan Gauld Tutorial - OOP

[Payal Rathod]

Hi,
I am reading Alan's tut and have stuck on the  OOP chapter.
What does he mean by,

| Objects are collections of data and functions that operate on that 
|data.  These are bound together so that you can pass an object from one 
|part of your program and they automatically get access to not only the 
|data attributes but the operations that are available too.

What are exactly "data attributes" and what "operations" is he referring 
to?
With warm regards,
-Payal