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ECC
Error correcting code. Logic designed to detect and correct memory errors.

EDO
Extended data out. An asynchronous DRAM operating mode that improves access times compared to fast page mode (FPM) DRAMs.

EEPROM
Electrically erasable, programmable, read-only memory. EEPROMs differ from DRAMs in that the memory is saved even if electrical power is lost. Additionally, the memory can be erased and reprogrammed repeatedly.

Edge Contacts
See Edge Connector

Edge Connector
Metal tabs on the edge of a printed circuit board (PCB). The edge contacts are the interface between the PCB and the socket that allow the system to communicate with the memory module.

Electrostatic Discharge (ESD)
The dissipation of electricity. (In layman's terms, a "shock.") ESD can easily destroy semiconductor products, even when the discharge is to small to be felt.

Ethernet
A local area network allowing several computers to transfer data over a communications cable.

eTT
eTT memory are either DDR or DDR2 chips which are fully tested Dram chip and sold to module manufacturers who needs to remark and add their own brand/logos to differentiate their products from other manufacturers. This type of eTT dram are targeted at the "Value Memory Market" channel where the buyers are very price conscious. This kind of eTT chips are of highest quality and are used for assembly into DIMM or SODIMM modules for PC application.

For the value conscious segment, there are several different types of unbranded parts commonly used and assemble in value memory module. The three major types of Chips for value memory are; ETT, UTT, and downgraded DRAM.

Express Card
Express Card is a hardware standard replacing PC cards (also known as PCMCIA cards), both developed by the Personal Computer Memory Card International Association (PCMCIA). Express Card technology is designed to deliver high-performance, modular expansion to both desktop and notebook computers at a lower cost and in a smaller form factor. Users are able to add memory, wired and wireless communications, multimedia and security features by inserting Express Card modules into compliant systems.