The document discusses various corporate level strategies including stability, growth, retrenchment, and combination strategies. It describes stability strategies as maintaining the present course when there is no threat. Growth strategies include expanding market share through internal routes like diversification or external routes like mergers. Retrenchment strategies involve downsizing through divestment, liquidation or turnaround. A combination strategy example provided integrates stability, expansion and retrenchment elements. The document also discusses Porter's generic strategies of cost leadership, differentiation and focus as well as Miles and Snow's prospector, defender and analyzer adaptation models and the product life cycle model.