- SquareRootService from Lecture 1
- TaxService from Lecture 2
- TaxBean, model class for a single Tax rate record (a single province)
- TaxCollection, model class for a collection of Tax rate records (many provinces)
- HTTPServer from end of Lecture 2
- ExchangeRateService from the Lab, week 2
- HTTPCalcService from the Lab, week 2