President Barack Obama (right) and James Comey (left) in the White House Rose Garden, Washington, D.C., June 21, 2013, as Obama announced Comey's nomination as FBI Director. The Director of the Federal Bureau of Investigation (FBI) is appointed by the President and, since 1972, confirmed by the Senate.
An electric bill is a bill for the consumption of electric energy.
Transistor-transistor logic (TTL) is a digital logic design in which bipolar transistor s act on direct-current pulses. Many TTL logic gate s are typically fabricated onto a single integrated circuit (IC). TTL ICs usually have four-digit numbers beginning with 74 or 54.