4.4.1 Problem- solving
4.4.1.2 Following and writing algorithms
4..4.1.3 Abstraction
4.4.1.4 Information hiding
4.4.1.5. Procedural abstraction
4.4.1.6 Functional abstraction
4..4.1.7 Data abstraction
4.4.1.8 Problem abstraction/ reduction
4.4.1.9 Decomposition
4.4.1.10 Composition
4.4.1.11 Automation