4.2.1 Data structures
4.2.1.2 Single and multi dimensional arrays
4.2.1.3 Fields, records and files
4.2.1.4 Abstract data types/ data structures
4.2.2.1 Queues
4.2.3.1 Stacks
4.2.4 Graphs
4.2.5 Trees
4.2.6 Hash tables
4.2.7 Dictionaries
4.2.8 Vectors