TO can Abbreviation for transistor-outline metal-can package.

TO-5 A small cylindrical IC package about 0.375 inch (9.5 mm) in diameter and made of metal; it can have up to 12 pins protruding from the bottom of the can.

to-from indicator An instrument that forms part of the omnirange facilities and is used for resolving the 180° ambiguity.

toggle 1. A flip-flop. The term implies that the flip-flop will change state upon receipt of a clock pulse, and is used mainly with reference to flip-flops connected as a counter, in which the process of changing state is called toggling. 2. To use switches to enter data into the memory of a computer. 3. To change states abruptly in such a way that the process goes to completion once a critical point is reached, ...

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