Data Structures and Algorithms

Data Structure

A data structure is a way to store and organise data in computer that it can be used efficiently.
(http://en.wikipedia.org/wiki/Data_structure)

Abstract Data Types (ADTs)

Mathematical and logical model. Define data and operations but no implementation. 

(http://en.wikipedia.org/wiki/Abstract_data_type)

Ref:
http://en.wikipedia.org/wiki/Data_structure
http://en.wikipedia.org/wiki/Abstract_data_type
http://www.cs.princeton.edu/~rs/AlgsDS07/
http://en.wikipedia.org/wiki/Binary_search_tree