Images per minute. Refers to the number of images the scanner can produce from a double-sided page.
Inches Per Minute. Used quite often to denote feed rate.
Document scanners that can scan in duplex mode are frequently quoted as "ipm". Therefore 20 ppm on a simplex scanner may be rated as 40 ipm on a duplex scanner (depending on the scanner construction).
impressions per minute. The total number of printed sides that an electronic printer or offset press can print in one minute or one hour. There is potential confusion between this and pages per minute. For example, a printer that prints 50 single-sided pages per minute, is a 50 ppm printer. If it prints duplex at the same speed, it is considered a 100 ipm printer. The paper doesn't move any faster, but it has twice as many images applied to it in the same amount of time. See pages per minute.
The number of impressions printed on a page per minute. This is used to measure printing speed in laser printers.
Inches per Minute. Unit of measurement indicating the speed of the tool along its cutting path. For example: feed rate.
Acronym for Images per Minute (usually refers to scanning speeds)