Electronic Industries Association of Japan

• The EIAJ connectors used for DC power, used instead of three RCA plugs for component video connections.
• The TOSLINK optical S/PDIF audio connector.
• The EIAJ-1 videotape format, the first standardized format for industrial/non-broadcast video tape recording, released in 1969.

Transistor nomenclature

• The first digit "2" indicates this is a 3 lead device
• The letters "S" is common for all EIAJ registered semiconductors
• The following letter designates polarity and general application of the device. For transistors:
• * A PNP high frequency
• * B PNP low frequency
• * C NPN high frequency
• * D NPN low frequency
• * E P-gate thyristor
• * F N-base unijunction transistor
• * J P-channel field effect transistor
• * K N-channel field effect transistor
• * M bidirectional triode thyristor
• The numerals following indicate the order in which the application was received, starting at 11
• A suffix letter indicates improved characteristics