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  2. History of PDF - Wikipedia

    en.wikipedia.org/wiki/History_of_PDF

    The Portable Document Format (PDF) was created by Adobe Systems, introduced at the Windows and OS/2 Conference in January 1993 and remained a proprietary format until it was released as an open standard in 2008.

  3. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    Interactive Forms is a mechanism to add forms to the PDF file format. PDF currently supports two different methods for integrating data and PDF forms. Both formats today coexist in the PDF specification: [38] [53] [54] [55] AcroForms (also known as Acrobat forms), introduced in the PDF 1.2 format specification and included in all later PDF ...

  4. Free-culture movement - Wikipedia

    en.wikipedia.org/wiki/Free-culture_movement

    The free music movement, a subset of the free-culture movement, started out just as the Web rose in popularity with the Free Music Philosophy [30] by Ram Samudrala in early 1994. It was also based on the idea of free software by Richard Stallman and coincided with nascent open art and open information movements (referred to here as collectively ...

  5. 12 Free Things That Can End Up Costing You a Lot - AOL

    www.aol.com/finance/12-free-things-end-costing...

    Unfortunately, there’s really no such thing as a free lunch. Here are 12 “freethings that might actually end up breaking the bank rather than saving you any money. 12 Free Things That Can ...

  6. Gift economy - Wikipedia

    en.wikipedia.org/wiki/Gift_economy

    The new world religions, including Hinduism, Judaism, Buddhism, Confucianism, Christianity, and Islam all sought to preserve "human economies" where money served to cement social relationships rather than purchase things (including people). [45] Charity and alms-giving are religiously sanctioned voluntary gifts given without expectation of return.

  7. 10 Free Online Resources You Shouldn't Miss Out On - AOL

    www.aol.com/10-free-online-resources-everyone...

    1. Noba. Whether you’re just fascinated by psychology or studying it in college, you’ll find Noba to be an invaluable resource.The website, part of The Diener Education Fund, offers free, easy ...

  8. 32 Free Things That Are Only a Click Away - AOL

    www.aol.com/finance/32-free-things-only-click...

    Rather than throwing these items away, the owners give away items -- such as free baby stuff or outdoor furniture -- to the general public. Scope the things you should never buy new to get ideas.

  9. WWF (file format) - Wikipedia

    en.wikipedia.org/wiki/WWF_(file_format)

    WWF is a modification of the open standard PDF format for document exchange endorsed by the World Wide Fund for Nature (also abbreviated WWF) Germany. [1] The WWF format is promoted as being more environmentally friendly than other comparable document exchange formats (e.g. PDF or DOC) since documents in this format are designed to be more difficult to print.