Point of Sale (POS) scheme is used for making cashless and cash purchases at specified outlets. The POS PDA is a useful device to maintain records of purchase transactions and upload the information to the server (PC). The authenticated entry of data (using password) ensures the secure management of transaction data.

To attract customers merchants come up with various schemes and offers to increase sales during festive seasons. These schemes and offers increase the sale in the season but have partial impact on the overall profit. Instead if the customer is rewarded for each purchase it would increase sales and attract the customer again and again. It works well for both the customer and the retailer, where customer is benefited for purchases and the retailer has increased sales.

POS home card PDA developed by Aftek addresses the need.

Aftek's home card Personal Data Assistant a POS (Point of Sale device) is an electronic hand held device.

• Maintains the petrol and other transaction (grocery, and so on) information
• Facilitates easy transactions with service tax calculations
• Generates daily reports and receipts
• Supports data transfer between PDA and PC (server)
• Maintains card information
• Minimizes the traditional paper work and data duplication

• Customers are given contact based smart cards by the POS manager
• The card is associated with multiple shopping malls, petrol pumps, shops, etc
• The users can pay at these outlets using the smart cards and earn reward-points
• These points can be redeemed for further purchases
• These smart cards are re-chargeable through the PDA

Deployment Diagram

PDA transaction

• Card ID and associated transaction amount are updated on the card and the PDA device
• At the end of the day, transactions are uploaded using dialup or GPRS modem (PDA to server)
• There are two types of transactions
  • Cash transaction - Partial payment using smart card and partial payment using cash
  • Card transaction - Entire payment using card