Secure Digital (SD) is a non-volatile storage card format produced by the SDCARD Connection (SDA) for use in lightweight devices.
The typical was created in August 1999 by joint attempts between SanDisk, Panasonic (Matsushita Electric) and Toshiba as a noticable difference over MultiMediaCards (MMC), and is among the most industry standard. The three companies produced SD-3C, LLC, a firm that licenses and enforces intellectual property privileges associated with SD storage area credit cards and SD coordinator and ancillary products.
The firms also created the SD Relationship (SDA), a non-profit company, in January 2000 to market and create SDCARD requirements. SDA today has about 1,000 member companies. The SDA uses several trademarked logos held and accredited by SD-3C to enforce conformity with its features and assure users of compatibility.
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