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2. Flip chart - Wikipedia

   en.wikipedia.org/wiki/Flip_chart

   The paper is flipped from one side of the top of the triangle box to the other. metallic tripod (or easel) stand: usually has 3 or 4 metallic legs that are linked together at one extremity. A support board is attached to two of these legs to support the large paper pad. This is the most common type of flip chart stand.

3. Telephone keypad - Wikipedia

   en.wikipedia.org/wiki/Telephone_keypad

   A telephone keypad using the ITU E.161 standard. A telephone keypad is a keypad installed on a push-button telephone or similar telecommunication device for dialing a telephone number. It was standardized when the dual-tone multi-frequency signaling (DTMF) system was developed in the Bell System in the United States in the 1960s – this ...

4. One-time pad - Wikipedia

   en.wikipedia.org/wiki/One-time_pad

   One-time pad. A format of one-time pad used by the U.S. National Security Agency, code named DIANA. The table on the right is an aid for converting between plaintext and ciphertext using the characters at left as the key. In cryptography, the one-time pad (OTP) is an encryption technique that cannot be cracked, but requires the use of a single ...

5. Flip book - Wikipedia

   en.wikipedia.org/wiki/Flip_book

   Flip book. A flip book, flipbook, [1] flicker book, or kineograph is a booklet with a series of images that very gradually change from one page to the next, so that when the pages are viewed in quick succession, the images appear to animate by simulating motion or some other change. Often, flip books are illustrated books for children, but may ...

6. Notebook - Wikipedia

   en.wikipedia.org/wiki/Notebook

   Notebook. A notebook (also known as a notepad, writing pad, drawing pad, or legal pad) is a book or stack of paper pages that are often ruled and used for purposes such as note-taking, journaling or other writing, drawing, or scrapbooking. A selection of notebooks.

7. Big Chief tablet - Wikipedia

   en.wikipedia.org/wiki/Big_Chief_tablet

   Big Chief tablet. The Big Chief tablet is a popular writing notebook designed for young children in the United States. It is made with newsprint paper and features widely spaced lines, easier to use for those learning to write. The tablet has a prominent representation of an American Indian man in full headdress on the cover, hence the name ...