Admin functionalities:

1. Manage Users: This module allows the admin to manage user accounts, such as creating new accounts, modifying existing accounts, and deleting accounts as needed.
2. Manage Categories: This module allows the admin to manage product categories, such as adding new categories, modifying existing categories, and deleting categories as needed.
3. Manage Products: This module allows the admin to manage products, such as adding new products, modifying existing products, and deleting products as needed.
4. Add Suppliers: This module allows the admin to add new suppliers to the system.
5. Manage Suppliers: This module allows the admin to manage supplier accounts, such as modifying existing supplier accounts and deleting supplier accounts as needed.
6. Transaction: This module allows the admin to manage transactions, such as viewing transaction history, updating transaction records, and deleting transaction records as needed.

User functionalities:

1. Sign Up: This module allows new users to sign up for an account by providing their personal information.
2. Forgot Password: This module allows users to reset their password if they forget it by providing their email address and following the password reset process.
3.  Purchase products: This module allows users to browse available products and purchase products they wish to buy.
4. Print Purchase products list: This module allows users to view and print a list of their purchased products.
5. Update and Delete Account: This module allows users to update their personal information and delete their account if needed.

Supplier functionalities:

1. Delivery products: This module allows the supplier to manage product deliveries, such as updating delivery status and marking deliveries as completed.
2. Update and Delete Account: This module allows the supplier to update their personal information and delete their account if needed.

Overall, this system allows for the efficient management of users, categories, products, suppliers, and transactions. Users can sign up for accounts, purchase products, and manage their personal information, while suppliers can manage their deliveries and personal information. The admin has full control over the system, allowing for efficient management of all system components.