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  2. WhatsApp - Wikipedia

    en.wikipedia.org/wiki/WhatsApp

    WhatsApp Web's user interface is based on the default Android one and can be accessed through web.whatsapp.com. Access is granted after the users scan their personal QR code through their mobile WhatsApp application. There are similar solutions for macOS, such as the open-source ChitChat, previously known as WhatsMac.

  3. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_code

    Whereas a barcode is a machine-readable optical image that contains information specific to the labelled item, the QR code contains the data for a locator, an identifier, and for web-tracking. To efficiently store data, QR codes use four standardized modes of encoding: (i) numeric, (ii) alphanumeric, (iii) byte or binary, and (iv) kanji . [4]

  4. Login - Wikipedia

    en.wikipedia.org/wiki/Login

    Login. In computer security, logging in (or logging on, signing in, or signing on) is the process by which an individual gains access to a computer system or program by identifying and authenticating themselves. The user credentials are typically some form of a username and a password, [1] and these credentials themselves are sometimes referred ...

  5. Use WebMD’s Pill Identifier to find and identify any over-the-counter or prescription drug, pill, or medication by color, shape, or imprint and easily compare pictures of multiple drugs.

  6. Tizanidine Oral: Uses, Side Effects, Interactions ... - WebMD

    www.webmd.com/drugs/2/drug-1024/tizanidine-oral

    Side Effects. Dry mouth, drowsiness, dizziness, lightheadedness, constipation, weakness, and tiredness may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly ...

  7. calcium carbonate - Uses, Side Effects, and More - WebMD

    www.webmd.com/drugs/2/drug-5916-139/calcium...

    Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: nausea / vomiting, loss of appetite, unusual weight ...

  8. Barcode - Wikipedia

    en.wikipedia.org/wiki/Barcode

    A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called barcode readers, of which ...

  9. What a Coronary Calcium Score Reveals About Heart Health - WebMD

    www.webmd.com/heart-disease/coronary-calcium-scan

    This heart scan uses a special type of X-ray called a CT scan. It takes pictures of your arteries , the vessels that carry blood away from your heart , to check for calcium. You may hear this scan ...