Part of the Multimedia and graphics glossary:

1) For a given font , cpi (characters per inch) is the number of typographic character that will fit on each inch of a printed line. The measurement applies mainly to monospace ( fixed-width ) fonts. Fonts with characters of proportional (varying) widths have an average cpi.

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2) cpi (cyles per instruction, or clocks per instruction) is the number of computer clock speed cycles (alternating current pulses) that occur while a computer instruction is being executed (performed by the computer processor). The number of cycles per instruction can be reduced by using pipelining . In some superscalar processors, more than one instruction can be performed during a single clock cycle.

3) CPI (Common Programming Interface) is the application program interface ( API ) specified as part of IBM's proprietary software architecture, the Systems Application Architecture ( SNA ).

This was last updated in April 2005
Posted by: Margaret Rouse

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