SET Secure Electronic Transaction
By VISA, MASTER credit card associations, such as manufacturers and network hardware and software developed in cooperation of credit card user authentication (VERIFICATION) specifications.

SGML Standard Generalized Markup Language
Developed by the ISO in the document (DOCUMENT) the inclusion of format annotations (TAGGING) standards.

SGSN (Serving GPRS Support Node) & GGSN (Gateway GPRS Support Node)
These two seemingly similar term, often confusing. In fact, with the Internet architecture, using the concept of the same node. Node is the base station operators in the structure, it will set the number of nodes (NODE), as the base station communicate with each other or record the user data connection was "record point."
As the GPRS packet transmission method is used, the SGSN is responsible for this part of the data processing, for example, you are now in the coverage of base station A, then A base station access node will record the amount of information, when you move to B when the base station, A node, the data will be automatically transferred to the node B base stations, so that it can successfully complete the data transfer.
The above explanation are SGSN (supporting GPRS data nodes) of the function, following a further explanation of the role of the GGSN.
A certain number of base stations (eg, 10), telecom operators will set up a base station center responsible for the integration of information between the base station through the optical fiber network back to spread to room, while the GGSN is mounted on a base station center gateway nodes, each base station is responsible for handling the returned information on the Internet.

Shadow PC
Will be stored in ROM-BIOS program to speed up the BIOS copied to the RAM access speed technology.