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2. Forced free trial - Wikipedia

   en.wikipedia.org/wiki/Forced_Free_Trial

   Forced free trial. A forced free trial is a direct-marketing technique, usually for goods sold by regular subscription, in which potential buyers are sent a number of free samples of a product, usually periodic publications. Quite often publishers distribute free copies and the reader is not even asked to subscribe.

3. Code-break procedure - Wikipedia

   en.wikipedia.org/wiki/Code-break_procedure

   A code-break procedure is a set of rules which determine when planned unblinding should occur in a blinded experiment. FDA guidelines recommend that sponsors of blinded trials include a code-break procedure in their standard operating procedure. A code-break procedure should only allow a participant to be unblinded before the conclusion of a ...

4. Dual code - Wikipedia

   en.wikipedia.org/wiki/Dual_code

   In linear algebra terms, the dual code is the annihilator of C with respect to the bilinear form . The dimension of C and its dual always add up to the length n : A generator matrix for the dual code is the parity-check matrix for the original code and vice versa. The dual of the dual code is always the original code.

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   www.aol.com/products/utilities/system-mechanic

   Stop up to 80% of junk mail, wipe your name, address and phone from websites and much more. Download System Mechanic to help repair and speed up your slow PC. Try it free* for 30 days now.

6. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_code

   The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

7. Malwarebytes Premium Security | 30-Day Free* Trial | AOL Products

   www.aol.com/products/security/malwarebytes

   Find and remove viruses on your computer. Help prevent future infections with smart technology 24/7. Clean and protect up to 3 Windows or Mac computers. TRY IT FREE FOR 30 DAYS*. *To avoid monthly ...