# Glossory

### Socket

Communication is based on TCP/IP

### MIS-POS

Installed in merchants in-store POS machine, providing the operation activity to support and exchange function

### e-Buy POSP

A group / set of network equipment and server to process [e-Buy POS](https://book.e-buy.com/link/124#bkmrk-e-buy-pos "Same as MIS-POS, the device is installed in merchant on-site, providing the operation activity to support and exchange function") all transaction activity

### BCD

Binary numeric representation format, such as 0x99, it represents the value of 99

### TLV

Communication protocol commonly used data formats, Comprise 3 parts: "Tag", "Length" & "Value"

### PINPAD

PIN entry device

### e-Buy POS

Same as [MIS-POS](https://book.e-buy.com/link/124#bkmrk-mis-pos "Installed in merchants in-store POS machine, providing the operation activity to support and exchange function"), the device is installed in merchant on-site, providing the operation activity to support and exchange function

### e-Buy Backend

A group /set of equipment / server to process all the transaction from [e-Buy POS](https://book.e-buy.com/link/124#bkmrk-e-buy-pos "Same as MIS-POS, the device is installed in merchant on-site, providing the operation activity to support and exchange function")

### Middleware

Individual operation in cashier terminal, monitoring the local port, it will also download the key and auto sign in, auto update and prompt transaction options