PDF | Wikipedia audio article
This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/PDF
00:01:17 1 History and standardization
00:03:34 2 Technical foundations
00:04:11 2.1 PostScript
00:06:23 3 Technical overview
00:06:32 3.1 File structure
00:09:47 3.2 Imaging model
00:10:57 3.2.1 Vector graphics
00:12:13 3.2.2 Raster images
00:15:07 3.2.3 Text
00:15:33 3.2.3.1 Fonts
00:16:21 3.2.3.2 Standard Type 1 Fonts (Standard 14 Fonts)
00:17:22 3.2.3.3 Encodings
00:18:43 3.2.4 Transparency
00:20:35 3.3 Interactive elements
00:21:50 3.3.1 AcroForms
00:24:03 3.3.1.1 Forms Data Format (FDF)
00:24:55 3.3.1.2 XML Forms Data Format (XFDF)
00:27:06 3.3.2 Adobe XML Forms Architecture (XFA)
00:27:58 3.4 Logical structure and accessibility
00:29:28 3.5 Optional Content Groups (layers of it)
00:30:34 3.6 Security and signatures
00:32:32 3.6.1 Usage rights
00:34:03 3.7 File attachments
00:34:21 3.8 Metadata
00:35:27 3.9 Usage restrictions and monitoring
00:36:29 3.10 Default display settings
00:36:56 4 Intellectual property
00:37:24 5 Technical issues
00:37:34 5.1 Accessibility
00:39:38 5.2 Viruses and exploits
00:41:38 6 Content
00:43:16 7 Software
00:44:45 7.1 Editing
00:46:43 7.2 Conversions
00:48:32 7.3 Annotation
00:50:54 7.4 Other
00:54:51 8 See also
Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.
Learning by listening is a great way to:
increases imagination and understanding
improves your listening skills
improves your own spoken accent
learn while on the move
reduce eye strain
Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.
Listen on Google Assistant through Extra Audio:
https://assistant.google.com/services...
Other Wikipedia audio articles at:
https://www.youtube.com/results?searc...
Upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
Speaking Rate: 0.8777810226963456
Voice name: en-US-Wavenet-D
"I cannot teach anybody anything, I can only make them think."
Socrates
SUMMARY
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The Portable Document Format (PDF) is a file format developed by Adobe in the 1990s to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. Based on the PostScript language, each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, vector graphics, raster images and other information needed to display it. PDF was standardized as an open format, ISO 32000, in 2008, and no longer requires any royalties for its implementation.
Today, PDF files may contain a variety of content besides flat text and graphics including logical structuring elements, interactive elements such as annotations and form-fields, layers, rich media (including video content) and three dimensional objects using U3D or PRC, and various other data formats. The PDF specification also provides for encryption and digital signatures, file attachments and metadata to enable workflows requiring these features.