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Secure Digital, officially abbreviated as SD, is a proprietary non-volatile memory card format developed by the SD Association (SDA) for use in portable devices.

History[]

The standard was introduced in August 1999 by joint efforts between SanDisk, Panasonic (Matsushita Electric) and Toshiba as an improvement over MultiMediaCards (MMC),[1] and has become the industry standard. The three companies formed SD-3C, LLC, a company that licenses and enforces intellectual property rights associated with SD memory cards and SD host and ancillary products.[2]

The companies also formed the SD Association (SDA), a non-profit organization, in January 2000 to promote and create SD Card standards.[3] SDA today has about 1,000 member companies. The SDA uses several trademarked logos owned and licensed by SD-3C to enforce compliance with its specifications and assure users of compatibility.[4]

Apple models with SD card support[]

Built-in SD card support was phased out of recent Apple models, such as notebooks with Retina displays. Reading SD cards in such models require the use of a USB adapter or dongle. Industry analysts have reported that Apple is planning to re-introduce support for SD cards in 2021 models.[5]

References[]

  1. Matsushita Electric, SanDisk and Toshiba Agree to Join Forces to Develop and Promote Next Generation Secure Memory Card. DP Review (1999-08-24). Retrieved on 2016-02-23.
  2. Welcome to SD-3C, LLC. SD-3C (2015-03-30). Retrieved on 2016-02-23.
  3. Matsushita Electric, SanDisk and Toshiba to Form SD Association to Promote Next Generation SD Memory Card. Toshiba (2015-03-30). Retrieved on 2016-02-23.
  4. Using SD Memory Cards is Easy. SD Association (2010-06-22). Retrieved on 2014-01-02.
  5. Bloomberg: Next MacBook Pro to Feature SD Card Reader by Joe Rossignol, MacRumors. 2021-01-22.

External links[]

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