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The iPhone, developed by Apple Inc., is a line of smartphones that combine a mobile phone, digital camera, personal computer, and music player into one device. Introduced by then-CEO Steve Jobs on January 9, 2007, the iPhone revolutionized the mobile phone industry with its multi-touch interface and lack of physical keyboard.
Mac OS X has built-in PDF support, both for creation as part of the printing system and for display using the built-in Preview application. Older PDF files are supported by almost all modern e-book readers, tablets and smartphones. Newer PDF files may not display properly on older e-readers, may not open, or may crash them.
Documents containing Adobe extended features still carry the PDF base version number 1.7 but also contain an indication of which extension was followed during document creation. [21] PDF documents conforming to ISO 32000-2 carry the PDF version number 2.0, and are known to developers as "PDF 2.0 documents".
With the release of iOS 9, advanced text formatting options, several styles of lists, rich web and map link previews, support for more file type attachments, a corresponding dedicated attachment browser, and a system share extension point for saving web links, images, and more were added to the Notes app. [56] Since iOS 11, Notes has included a ...
Apple sold 6.1 million units of the original iPhone between Q3 FY2007 [note 4] and Q4 FY2008, and 11.3 million units of the iPhone 3G in Q4 FY2008 and Q1 FY2009. [206] In 2008, the iPhone reached 1.1% of worldwide mobile phone market share, [207] and 8.2% of the smartphone market. [208]
Besides powering iPhone, iOS is the basis for three other operating systems made by Apple: iPadOS, tvOS, and watchOS. [8] iOS formerly also powered iPads until iPadOS was introduced in 2019 and the iPod Touch line of devices until its discontinuation. [9] iOS is the world's second most widely installed mobile operating system, after Android.
iOS 9 is the ninth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iOS 8. It was announced at the company's Worldwide Developers Conference on June 8, 2015, and was released on September 16, 2015. It was succeeded by iOS 10 on September 13, 2016. [2] iOS 9 incorporated many feature updates to ...
Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.