EIA

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1a. Electronics Industry Association. EIA is commonly associated with defining one of the standard amplifier power rating methods. The methodology rates the power at a frequency, typically 1kHz, and THD level, typically 0.1% or 1%. It also tests a single channel. Because of the test conditions it typically results in higher ratings than the FTC method. Also see QSC - Glossary of Audio Terms.

1b. Electronics Industries Alliance. From http://en.wikipedia.org/wiki/Electronic_Industries_Alliance :

The Electronic Industries Alliance (EIA, until 1997 Electronic Industries Association) was a standards and trade organization composed as an alliance of trade associations for electronics manufacturers in the United States. They developed standards to ensure the equipment of different manufacturers was compatible and interchangeable. The EIA ceased operations on February 11, 2011, but the former sectors continue to serve the constituencies of EIA. ...

With the changing names of the EIA also the naming convention of the standards was adapted. A standard defining serial communication between computers and modems e.g. was originally drafted as a recommended standard, thus the "RS" RS-232. Later it was taken over by the EIA as EIA-232. Later this standard was managed by the TIA and the name was changed to the current TIA-232. Because the EIA was accredited by ANSI to help develop standards in its areas, the standards are often described as e.g. ANSI TIA-232 (or formerly as ANSI EIA/TIA-232').

For a list of well-known EIA standards, see EIA standards.