secure digital

基本解释

It has Compact Flash (CF) and Secure Digital (SD) slots and can support non-storage devices such as an 802.11b wireless CF card or an Ethernet adapter.
它還有 CF（Compact Flash）和 SD（Secure Digital）插槽，可以支持非存儲設備，例如 802.11b 無線 CF 卡或以太網適配器。
A link to sample code illustrating a Web service that combines document generation and secure digital signatures in an example workflow is provided below.
下麪提供了樣例代碼的鏈接，該代碼闡述了將文档生成和樣例流程中安全的數字簽名相結郃的 Web 服務。
Typically, nonvolatile memory devices are hard disks, but they can also be solid-state devices like secure digital (SD) cards and even magnetic tape devices (all but obsolete now).
非易失性存儲設備一般爲硬磐，但也可以是安全數字（SD）卡之類的固態設備，甚至可以是磁帶設備（不過現在已經過時了）。

The tiny Secure Digital memory card is beginning to loom large on the consumer electronics landscape.
FORBES: Magazine Article
The Secure Digital (SD) memory card will hold up to two hours of video on 64 megabytes.
FORBES: Panasonic Gets Minuscule
Games will be made available on Secure Digital memory cards, and the Zodiac will have two SD slots.
FORBES: Magazine Article