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2. Ink cartridge - Wikipedia

   en.wikipedia.org/wiki/Ink_cartridge

   Two cartridges; one with black ink (a third-party HP 15 compatible cartridge), one with colored inks (an original type HP 17 tri-color cartridge) currently installed in an HP inkjet printer. An ink cartridge or inkjet cartridge is a component of an inkjet printer that contains ink to be deposited onto paper during printing . [ 1 ]

3. Toner refill - Wikipedia

   en.wikipedia.org/wiki/Toner_refill

   Refilling kits include printer-specific instructions. The following basic types of refill toner (differing mainly in particle size and fusing temperature) have been identified by one vendor while other refill vendors insist that each printer or copier model requires a unique type. [citation needed] HP, Canon printers; Canon PC copiers

4. HP-21 - Wikipedia

   en.wikipedia.org/wiki/HP-21

   The HP-21 was a scientific calculator produced by Hewlett-Packard between 1975 and 1978. [1] It was designed as a replacement for the HP-35 , and was one of a set of three calculators, the others being the HP-22 and HP-25 , which were similarly built but aimed at different markets.

5. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

6. Inkjet printing - Wikipedia

   en.wikipedia.org/wiki/Inkjet_printing

   Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. [1] Inkjet printers were the most commonly used type of printer in 2008, [2] [needs update] and range from small inexpensive consumer models to expensive professional machines.

7. HP calculators - Wikipedia

   en.wikipedia.org/wiki/HP_calculators

   HP's first scientific calculator, HP-35 With this in mind, HP built the HP 9100 desktop scientific calculator. This was a full-featured calculator that included not only standard "adding machine" functions but also powerful capabilities to handle floating-point numbers, trigonometric functions , logarithms, exponentiation, and square roots .