pos software is the popular abbreviation of Electronic Point of Sale. The machine basically consists of a computer and a visual display unit. Touch screen monitors are used in advanced EPoS devices. Supplementary input and output equipments like printers and barcode scanners can be attached depending on the user's requirements. Two major types of EPoS system available in the market - Integrated system and modular system. In an integrated system the computer and display comes as a single unit. They are inherently attached with printers, scanners and other devices included in the EPoS package. The modular type of system offers more flexibility compared to the integrated ones. In a modular setup, there is a standalone computer which is connected to a special visual display unit and other peripheral devices