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2. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more ...

3. HP coupon 20% off ink and toner - AOL

   www.aol.com/news/2010-10-08-hp-coupon-20-off-ink...

   If you save money buying off-brand ink cartridges and toner, this HP ink coupon for 20% off may convince you to pay more for HP ink. Expires Oct. 31, 2010. To get the coupon, either share a horror ...

4. How to keep your HP ink cartridges going when they just say no

   www.engadget.com/2005-03-01-how-to-keep-your-hp...

   We still don't know whether HP's inkjet cartridges have built-in expiration dates, as alleged in a recent class-action lawsuit; we think it's bad enough that "smart" cartridges from many brands ...

5. Ink cartridge - Wikipedia

   en.wikipedia.org/wiki/Ink_cartridge

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

6. List of Hewlett-Packard products - Wikipedia

   en.wikipedia.org/wiki/List_of_Hewlett-Packard...

   D – HP Deskjet Dxxxx printer; D – HP Photosmart Dxxxx Single Function photo printer; F – HP Deskjet Fxxx All-in-One printer; G – HP Scanjet Gxxxx photo/flatbed scanner; K – HP Officejet Pro Kxxx color printer; M – HP Mono LaserJet Mxxxx Multifunction printer; N – HP Scanjet Nxxxx document/professional image scanner; P – HP Mono ...

7. HP issues non-apology for blocking third-party ink cartridges

   techcrunch.com/2016/09/29/hp-issues-non-apology...

   HP was recently caught in the act using a "security update" to prevent its printers from operating with a number of recycled and third-party ink cartridges. After much outcry the company has ...