e - technical definition

The symbol for electron. See electron.

Exa. From the Greek hexa, meaning six, translates to quintillion, referring to the fact that, in terms of order of magnitude in base 1,000, exa is 1,000 6 . In order, that puts it right behind kilo (thousand), Mega (million), Giga (billion),Tera (trillion), and Peta (quadrillion).
In terms of the electromagnetic spectrum, EHz (ExaHertz) is a quintillion (10 18 ) Hertz, which is in the range of X-rays, gamma rays and cosmic rays, none of which are currently have any application in telecommunications. An Ebps would be a quintillion (10 18 ) bits per second (bps). In transmission systems, therefore, a quintillion would be exactly 1,000,000,000,000,000,000 since the measurement is based on a base 10, or decimal, number system. That definitely would be broadband, if it were possible, but it is difficult to imagine an application for that level of bandwidth. See also bandwidth, bps, broadband, and electromagnetic spectrum.
Voltage. See voltage.
In physics, the symbol for energy. See energy.
In physics, the symbol for electromotive force. See electromotive force.