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The cambridge Z88 came out in 1987- and was a serious attempt to revolutionize portable computing
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Samsung Manufactured their first tablet- the GRiDPad 1910. Some improvements were made from the first tablet- wider bigger screen, a stylus based input system
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In 1991 the Poqet Pad Computer cooperation, in partnership with Fujitsu, introduced the PoqetPad. PoquetPad was handheld, touch-screen computer with an NEC V20 CPU chip running.
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The grid 2260 by microsoft was one of the first convertible tablets. It was the first notebook with a pen-senstive screen that could pvot and lie flat against the keyboard for use as a slate The GRIPDPAD was one of the earliest tablet style computers.
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Launched in 2000, the sonicblue wireless webpad was marketed as a "wireless protable information appliance" targete to vertical market segments. It has a virtual keyboard of handwriting recognition on its touchscreen.
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Over the last decade, more and mroe tablets were developed and its clear to see how these designs paved the way for the ipad. For example the Archos Jukebox Multimedia became the first juke-box style player capable of playing MPEG-4 video files. It is clear to see the likeness with the ipad: this milestone tablet fully achieved its purpose of liberating digital video files from PC's
