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The HX-20 (also known as the HC-20) is an early laptop released by Seiko Epson in July 1982. It was the first notebook-sized portable computer, [4] [5] occupying roughly the footprint of an A4 notebook while being lightweight enough to hold comfortably with one hand at 1.6 kilograms (3.5 lb) and small enough to fit inside an average briefcase.
Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms.
Epson has released a firmware patch to bring the R-D1 up to the full functionality of its successor, being the first digital camera manufacturer to make such an upgrade available for free. [citation needed] In September 2012, Epson introduced a printer called the Expression Premium XP-800 Small-in-One, with the ability to print wirelessly. [20]
User's guide for a Dulcitone keyboard. A user guide, also commonly known as a user manual, is intended to assist users in using a particular product, service or application. It is usually written by a technician, product developer, or a company's customer service staff. Most user guides contain both a written guide and associated images.
Printer steganography is a type of steganography – "hiding data within data" [30] – produced by color printers, including Brother, Canon, Dell, Epson, HP, IBM, Konica Minolta, Kyocera, Lanier, Lexmark, Ricoh, Toshiba and Xerox [31] brand color laser printers, where tiny yellow dots are added to each page. The dots are barely visible and ...
Alexander Murray and Richard Morse invented and patented the first analog color scanner at Eastman Kodak in 1937. Intended for color separation at printing presses, their machine was an analog drum scanner that imaged a color transparency mounted in the drum, with a light source placed underneath the film, and three photocells with red, green, and blue color filters reading each spot on the ...
In the United States, popular brands of AT clones included the Tandy 3000, Compaq Deskpro 286, HP Vectra, [26] Zenith Z-286, [27] Epson Equity Models II+ [28] and III, [29] and Commodore PC-30 and PC-40. In Europe, on the other hand, most AT-clones sold were more or less anonymous.
In 2018, Twinkl released a free AR classroom application. Pupils can see how York looked over 1,900 years ago. [178] Twinkl launched the first ever multi-player AR game, Little Red [179] and has over 100 free AR educational models. [180] Augmented reality is becoming more frequently used for online advertising.