1. Introduction; 2. Time scales in financial calculations; 3. Using various compound interest/discount; 4. The price/size gradient; 5. The money yield table; 6. Discount revenue and expenditure; 7. Net Discount revenue; 8. The internal rate of return; 9. Other financial tools; 10. Computers in Forestry; 11. Computer application for decision-Making; 12. Use of computers in decision-making; 13. The planting decision; 14. The site improvement decision; 15. The thinning decision; 16. The felling decision; 17. The pruning decision; 18. Summary and conclusion