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  2. Eastern Time Zone - Wikipedia

    en.wikipedia.org/wiki/Eastern_Time_Zone

    The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. Eastern Standard Time ( EST ) is five hours behind Coordinated Universal Time ( UTC−05:00 ).

  3. List of time zone abbreviations - Wikipedia

    en.wikipedia.org/.../List_of_time_zone_abbreviations

    Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+08:00), Cuba Standard Time (UTC−05:00), and (North American) Central Standard Time (UTC−06:00), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in ...

  4. What Do AM and PM Stand For? - AOL

    www.aol.com/am-pm-stand-153002424.html

    If the answer to the question “What do AM and PM mean” surprised you, find out the answer to “What does P.S. stand for.” Sources : Dictionary.com : “What Do “a.m.”

  5. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    PDF 2.0 defines 256-bit AES encryption as the standard for PDF 2.0 files. The PDF Reference also defines ways that third parties can define their own encryption systems for PDF. PDF files may be digitally signed, to provide secure authentication; complete details on implementing digital signatures in PDF are provided in ISO 32000-2.

  6. Date and time notation in the United States - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    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.

  7. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before midday") and p.m. (from Latin post meridiem, translating to "after midday").

  8. Lists of abbreviations - Wikipedia

    en.wikipedia.org/wiki/Lists_of_abbreviations

    List of abbreviations in photography; List of glossing abbreviations (grammatical terms used in linguistic interlinear glossing) List of legal abbreviations; List of medical abbreviations; List of abbreviations for medical organisations and personnel; Reporting mark (owners of rolling stock and other railway equipment) List of style guide ...

  9. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!