Task1 Uploader
Task2 Calculator
Task3 Read/write from/to a file
Task4 SQL inheritance
Task5 Interface iWorkData
Task6 Interfaces
Task7 Contact Form
Task9 Html Helper
Task10 SQL extended
Task11 Active Record
Task13 Unit tests
DB
Task1 Book Catalogue db scheme with cart
Task2 SQL DB Indexes (MySQL, PostgreSQL)
Task3 SQL join