21. For example, all 7405 devices provide six NOT gates ( or inverters ) but may have incompatible supply voltage tolerances. 22. Until 2000, Metro entrances were not gated and the paid zone was marked by a line painted on the floor. 23. Schmalensee will be followed over the coming months by some of Microsoft's top executives _ but not Gates , its famous billionaire chairman. 24. Fixing CONTROL as | 1 \ rangle, the TARGET output of the CNOT gate yields the result of a classical NOT gate . 25. The NOT gates , or inverters, are attached in a chain and the output of the last inverter is fed back into the first. 26. If you are coming from the Blue Ridge Parkway, follow Forest Road 63 ( if it is not gated ) to Dillingham Road. 27. Convergence is not gated by incremental discovery of a bridge s place on a multicast tree by the use of separate signaling transactions. 28. For example, by placing controls on ancilla bits, a Toffoli gate can be used as a controlled NOT gate or a NOT gate . 29. Two separately controlled NOT gates were realized where the successful operation of the first was heralded by a measurement of two ancillary photons. 30. For example, by placing controls on ancilla bits, a Toffoli gate can be used as a controlled NOT gate or a NOT gate.