Worked on updating the Australia geographical data within the NclRSE-Training/countries repository to ensure training materials reflected the most current country information. Focused on documentation and data accuracy, the developer revised the Australia data file to include updated population figures and the correct capital city, as well as adding a generic information line for completeness. All modifications were made in plain text format, with careful attention to maintaining a clear and auditable commit history. No bug fixes were required during this period, and the work emphasized reproducibility and traceability, supporting ongoing improvements to the quality and reliability of training datasets.