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The American Heritage Dictionary of the English Language states "By convention, 12 AM denotes midnight and 12 PM denotes noon. Because of the potential for confusion, it is advisable to use 12 noon and 12 midnight". [34] E. G. Richards in his book Mapping Time (1999) provided a diagram in which 12 a.m. means noon and 12 p.m. means midnight. [35]
PM stands for “post meridiem,” meaning “after noon” or “after midday,” and as such applies to the times from noon onward. English-speaking countries have been using the “AM” and ...
The United States uses the 12-hour clock almost exclusively, not only in spoken language, but also in writing, even on timetables, for airline tickets, and computer software. The suffixes "a.m." and "p.m." (often represented as AM and PM) are appended universally in written language.
Abbrev. [1]Meaning [1] Latin (or Neo-Latin) origin [1]; a.c. before meals: a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night ...
PL/I—Programming Language One; PL/M—Programming Language for Microcomputers; PL/P—Programming Language for Prime; PLT—Power Line Telecommunications; PMM—POST Memory Manager; PNG—Portable Network Graphics; PnP—Plug-and-Play; PNRP—Peer Name Resolution Protocol; PoE—Power over Ethernet; PoS—Point of Sale; POCO—Plain Old Class ...
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Punctuation and spacing styles differ, even within English-speaking countries (6:30 p.m., 6:30 pm, 6:30 PM, 6.30pm, etc.). [ citation needed ] Most people who live in countries that use one of the clocks dominantly are still able to understand both systems without much confusion; the statements "three o'clock" and "15:00", for example, are ...
For example, "half ten" means 10:30 (a.m. or p.m.). This is itself an abbreviation of an older colloquialism, "half past ten". The abbreviation can cause misunderstanding with non-native speakers as this contrasts with many European languages, where the same type of expression denotes 30 minutes before the hour.