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The Collaborative International Dictionary

DC

electric current \electric current\, electrical current \electrical current\, the movement of electrically charged particles, atoms, or ions, through solids, liquids, gases, or free space; the term is usually used of relatively smooth movements of electric charge through conductors, whether constant or variable. Sudden movements of charge are usually referred to by other terms, such as spark or lightning or discharge. In metallic conductors the electric current is usually due to movement of electrons through the metal. The current is measured as the rate of movement of charge per unit time, and is counted in units of amperes. As a formal definition, the direction of movement of electric current is considered as the same as the direction of movement of positive charge, or in a direction opposite to the movement of negative charge. Electric current may move constantly in a single direction, called direct current (abbreviated DC), or may move alternately in one direction and then the opposite direction, called alternating current (abbreviated AC).

Wikipedia

DC

DC, D.C., Dc, or dc may refer to:

Dc (computer program)

dc is a cross-platform reverse-polishdesk calculator which supports arbitrary-precision arithmetic. It is one of the oldest Unix utilities, predating even the invention of the C programming language. Like other utilities of that vintage, it has a powerful set of features but an extremely terse syntax. Traditionally, the bc calculator program (with infix notation) was implemented on top of dc.

This article provides some examples in an attempt to give a general flavour of the language; for a complete list of commands and syntax, one should consult the man page for one's specific implementation.

Wiktionary

dc

init. (alternative case form of DC English)

Usage examples of "dc".

You surely can't expect your President to judder 'his way down to the Caribbean in a clapped-out DCS?