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2. International reply coupon - Wikipedia

   en.wikipedia.org/wiki/International_reply_coupon

   An international reply coupon (IRC) is a coupon that can be exchanged for one or more postage stamps representing the minimum postage for an unregistered priority airmail letter sent to another Universal Postal Union (UPU) member country.

3. Wireless Emergency Alerts - Wikipedia

   en.wikipedia.org/wiki/Wireless_Emergency_Alerts

   An example of a Wireless Emergency Alert on an Android smartphone, indicating a Tornado Warning in the covered area. Wireless Emergency Alerts (WEA, formerly known as the Commercial Mobile Alert System (CMAS), and prior to that as the Personal Localized Alerting Network (PLAN)), [1] is an alerting network in the United States designed to disseminate emergency alerts to mobile devices such as ...

4. UTF-8 - Wikipedia

   en.wikipedia.org/wiki/UTF-8

   As of May 2019, Microsoft has reversed its previous position of only recommending UTF-16; the capability to set UTF-8 as the "code page" for the Windows API was introduced; and Microsoft recommends programmers use UTF-8, [66] and even states "UTF-16 [...] is a unique burden that Windows places on code that targets multiple platforms".

5. Polar code (coding theory) - Wikipedia

   en.wikipedia.org/wiki/Polar_code_(coding_theory)

   The code construction is based on a multiple recursive concatenation of a short kernel code which transforms the physical channel into virtual outer channels. When the number of recursions becomes large, the virtual channels tend to either have high reliability or low reliability (in other words, they polarize or become sparse), and the data ...

6. Turbo code - Wikipedia

   en.wikipedia.org/wiki/Turbo_code

   The key innovation of turbo codes is how they use the likelihood data to reconcile differences between the two decoders. Each of the two convolutional decoders generates a hypothesis (with derived likelihoods) for the pattern of m bits in the payload sub-block.

7. Zero-coupon bond - Wikipedia

   en.wikipedia.org/wiki/Zero-coupon_bond

   Zero coupon bonds have a duration equal to the bond's time to maturity, which makes them sensitive to any changes in the interest rates. Investment banks or dealers may separate coupons from the principal of coupon bonds, which is known as the residue, so that different investors may receive the principal and each of the coupon payments.