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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. Since then, it has been under the control of an International Organization for Standardization (ISO) committee of ...
Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.
The history of education extends at least as far back as the first written records recovered from ancient civilizations. Historical studies have included virtually every nation. [1][2][3] The earliest known formal school was developed in Egypt's Middle Kingdom under the direction of Kheti, treasurer to Mentuhotep II (2061-2010 BC).
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history. For events from c. 500 – c. 1499, see: Timeline of post-classical history. For events from c. 1500, see: Timelines of modern history.
The history of libraries began with the first efforts to organize collections of documents.Topics of interest include accessibility of the collection, acquisition of materials, arrangement and finding tools, the book trade, the influence of the physical properties of the different writing materials, language distribution, role in education, rates of literacy, budgets, staffing, libraries for ...
Fire lance is the earliest firearm in the world and one of the earliest gunpowder weapons. [344] [345] 10th century: Fireworks in Song dynasty China: Fireworks first appear in China during the Song dynasty (960–1279), in the early age of gunpowder. Fireworks could be purchased from market vendors; these were made of sticks of bamboo packed ...
The history of writing traces the development of writing systems [ 1 ] and how their use transformed and was transformed by different societies. The use of writing prefigures various social and psychological consequences associated with literacy and literary culture. With each historical invention of writing, true writing systems were preceded ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 August 2024. Development of the table of chemical elements The American chemist Glenn T. Seaborg —after whom the element seaborgium is named—standing in front of a periodic table, May 19, 1950 Part of a series on the Periodic table Periodic table forms 18-column 32-column Alternative and extended ...