Invoice SYSTEM/ Memo SYSTEM
Discount SYSTEM/ Bonus SYSTEM 
- base on electronic readers and cards
- Invoice enables quick and faultless issuing the VAT invoices in computer systems
- Memo enables reading and writing any data on the card (it can be the discount card, identifier or card accumulating points)
- Discount is the element of discount system for ELZAB Delta cash registers
- Bonus co-operates with ELZAB Delta cash register and enable applying the discount, loyalty or promotion systems
- surface of cards can present customer or business data and advertisements
