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  2. HP-21 - Wikipedia

    en.wikipedia.org/wiki/HP-21

    A 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.

  3. Toner refill - Wikipedia

    en.wikipedia.org/wiki/Toner_refill

    Toner cartridges cannot be refilled indefinitely, because mechanical parts such as rollers wear out. Some cartridges include the electro-optical drum, which becomes depleted and can be scratched. Organizations refilling cartridges for resale usually clean and test each cartridge to ensure that it is fit for reuse and resale.

  4. 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 ]

  5. How much does Medicare supplement insurance (Medigap) cost? - AOL

    www.aol.com/medigap-plans-cost-150051859.html

    The cost of premiums for Medigap plans will vary widely depending on the plan letter and insurance provider. A person can compare the costs of Medigap plans in their area using the search tool on ...

  6. How to estimate your home insurance cost - AOL

    www.aol.com/finance/estimate-home-insurance-cost...

    Homeowners in the U.S. pay an average rate of $2,230 per year for $300,000 in dwelling coverage (as of July 2024). But how is home insurance calculated?

  7. HP-19B - Wikipedia

    en.wikipedia.org/wiki/HP-19B

    HP-19B, introduced on 4 January 1988, along with the HP-17B, HP-27S and the HP-28S, and replaced by the HP-19BII (F1639A) in January 1990, [2] was a simplified Hewlett Packard business model calculator, like the 17B. It had a clamshell design, like the HP-18C, HP-28C and 28S. [3]