# 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/136#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/136#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/136#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