This document summarizes a lecture on data structures presented by Jesmin Akhter, an associate professor. It defines data types and data structures, and provides examples of common data structures like arrays, linked lists, stacks, and queues. It also describes operations on data structures like traversing, searching, inserting and deleting. Algorithms are explained as the means to manipulate data in data structures. The complexity measures of algorithms, time and space complexity, are also introduced.